Physics question and answers for June 01, 2024
- Q 2. A 1000kg car traveling at 40m/s slows to 20m/s.a. Find initial kinetic energy.b. Find final kinetic energy. c. How much work is done on the car in slowing it...
- Q A car of mass 1063 kg climbs a 5.0 slope at a constant speed of 72.0 km/h. Assuming that air resistance may be neglected, at what rate must the engine...
- Q At a certain point on the trackway, a roller coaster car has 27,000 J of potential energy and 132,000 J of kinetic energy. The value 159,000 J equals this point.the...
- Q A 3.00-kg flowerpot is perched on a windowsill that is 8.20 m from the ground. How much gravitational potential energy does the flowerpot have relative to the ground?241 J201 J24...
- Q 3. A 0.05-kg car starts from rest at a height of 0.95 m. Assuming no friction,what is the kinetic energy of the car when it reaches the bottom of the...
- Q 9. The size of the water droplets represents the amount of energy applied to create a wave. What kind of relationship (direct, inverse) is there between the energy applied and...
- Q A firefighter climbs a ladder at a speed of 1.4 m/s. The ladder is 5.0 m long, and the firefighter weighs 65 kg. a) Determine the firefighter's power output while...
- Q How much work does a supermarket checkout attendant do on a can of soup he pushes 0.600 m horizontally with a force of 5.00 N? Express your answer in joules...
- Q A Mexican Jumping Bean jumps with the aid of a small worm that lives inside the bean. If a bean of mass 1.8 g jumps 1.0 cm from your hand...
- Q You perform the Hooke's Law experiment and create a plot of Displacement vs. Force. You add a linear fit and find the following equation for the line: y=0.180x -0.030 What...
- Q Problem 1) My cat, Boo, is very small. The vet didn't believe their assistant when the assistant said Boo weighed only 6.0 lbs. Boo jumps from my desk and lands...
- Q A worker lifts a heavy 15 kg box from the floor up to a height of 2 meters in about 6 seconds. Assuming there is a loss due to heat...
- Q A billiards cue ball moves towards two stationary balls that are next to each other (one in front of the other). All the balls just move in a single direction,...
- Q You are at the controls of a particle accelerator, sending a beam of 4.20x107 m/s protons (mass m) at a gas target of an unknown element. Your detector tells you...
- Q Two figure skaters, one weighing 635 N and the other 775 N, push off against each other on very smooth ice.?V=SubmitPart BK =SubmitPart CVAEHow much kinetic energy is "created" during...
- Q An book fell from a shelf 1.5 meters from the ground. If it took the book 3 seconds to hit the ground, what was the velocity of the book?O 3...
- Q In a circuit, 20 C of charge is passed through a battery in a given time. The plates of the battery are maintained at P.D. of 20 V. How much...
- Q You are in a zombie-themed paintball shooting range, armed with a spring-loaded paintball gun. The spring mechanism, with a spring constant of 8.6 x 104 N/m compresses 1.5 cm in...
- Q A shooting star is the trail of a meteor a chunk of debris hurtling through Earth's atmosphere. As drag slows down the meteor, its energy is converted into thermal energy....
- Q A 3500 kg amateur rocket is given a velocity 820 m/s. How many meters high can the rocket be expected to rise before falling back to Earth? How high is...
- Q A 0.300 kg puck, initially at rest on a horizontal, frictionless surface, is struck, is - struck by a 0.200 kg puck moving initially along the x axis with a...
- Q A boy reaches out of a window and tosses a ball straight up witha speed of 10 m/s. The ball is 20 m above the ground as hereleases it.Use coservation...
- Q Problem 5) A spring-loaded cannon is often used during projectile motion or conservation of energyphysics labs. Suppose you place a 3.47x10- kg steel ball into the cannon. The cannon is...
- Q Suppose a sled is being pulled by a Bernese Mountain dog across the snow (hisname was Berg). The 42.9 kg sled starts at rest and speeds up to 2.59 m/s...
- Q A 500-kg dragster accelerates from rest to a final speed of 96 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200...
- Q An object of mass 20.0 kg is at rest at the top of an inclined plane whose length is 12.0 m and which makes an angle of 30.0 with the...
- Q Two objects were lifted by a machine. One object had a mass of 2 kilograms, and was lifted at a speed of 2 m/sec. The other had a mass of...
- Q A man lifts a 20.0-kg bucket of concrete from the ground up to the top of a 25.0-m tall building. The bucket is initially at rest, but is traveling at...
- Q In the picture, Electrical energy goes into a lightbulb, and Heat and Light come out. Based on the Law of Conservation of Energy and the amounts shown in the picture,...
- Q If the car were approaching the hill instead at 30 m/s, would it roll toA car moving at 15 m/s approaches a hill. If the car were put in neutral,...
- Q A pulley with a lot of friction is very squeaky and is only 73% efficient. The pulley is used to lift a 58 kg mass to a height of 3.0...
- Q A 0.60 kg block attached to a spring with force constant 130 N/m is free to move on a frictionless, horizontal surface as in the above figure. The block is...
- Q A hoop of radius 0.50 m and a mass of 0.20 kg is released from rest and allowed to roll down an inclined plane. How fast is it moving after...
- Q Under the influence of conservative forces only, an object of mass 9 kg is displaced from point A to point B. Its potential energy and speed at point A respectively...
- Q A weight lifter lifts a 280-N set of weights from ground level to a position over his head, a vertical distance of 1.95 m. How much work does the weight...
- Q Two blocks A and B of masses m and 2m, respectively, are connected with the help of a spring having spring constant, k as shown in Fig. Initially, both the...
- Q A piano with a mass of 124 kg is lifted 10 m above the ground in 4 s by a crane. What is the power used by the crane, measured...
- Q A ball of mass 0.100 kg traveling with 5.00 m/s had a head on collision with a ball of mass 0.200 kg initially at rest. After the collision, the second...
- Q A skier traveling 11.0 m/s reaches the foot of a steady upward 18 incline and glides 14 m up along this slope before coming to rest. What was the average...
- Q A horizontal spring with a spring constant of 130 is attached to a wall. Someone comes along andpresses against it, compressing it by 1.4 meters.How much energy is stored in...
- Q A tractor-trailer truck traveling at a speed of 4.2 m/s with a mass of 19,589 kg is traveling on a horizontal surface when it strikes a gigantic horizontal spring which...
- Q A person of mass 60 kg descends down a slide with a height of 3.8 m. The person starts from rest and reaches the bottom with a speed of 3.11...
- Q A spring has a spring stiffness constant & of 85.0 N/m. How much must this spring be compressed to store 45.0 J of potential energy? Express your answer to three...
- Q How much work must be done to stop a 1075-kg car traveling at 110 km/h? Express your answer to two significant figures and include the appropriate units.
- Q If the gravitational potential energy of the book-Earth system increases by 8.84 J. how high is the bookshelf above the desk? Express your answer to three significant figures and include...
- Q The potential energy of a particle moving along the axis is shown in the figure. (Figure 1) When the particle is at = 1.0 m it has 3.6 J of...
- Q The kinetic friction force between a 60.0-kg object and a horizontal surface is 42.0 N. If the initial speed of the object is 24.0 m/s, and friction is the only...
- Q At a playground, a 20 kg child plays on a slide that drops through a height of 2.5 m. The child starts at rest at the top of the slide....
- Q In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the...
- Q George is riding a roller coaster that starts at a height of 46 m and goes down into a valley that is at ground level. He then goes up a...
- Q With what minimum speed must you toss a 200 g ball straight up to just touch the 14-m-high roof of the gymnasium if you release the ball 1.6 m above...
- Q What height does a frictionless playground slide need so that a 35 kg child reaches the bottom at a speed of 4.7 m/s?
- Q A basketball player makes a jump shot. The 0.600-kg ball is released at a height of 2.19 m above the floor with a speed of 7.36 m/s. The ball goes...
- Q A student places her 440 g physics book on a frictionless table. She pushes the book against a spring, compressing the spring by 6.10 cm, then releases the book. What...
- Q In a hydroelectric dam, water falls 35.0 m and thenspins a turbine to generate electricity.Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How...
- Q 7.80-9 bullet moving at 500 m/s penetrates a tree trunk to a depth of 4.70 cm.(a) Use work and energy considerations to find the average frictional force that stops the...
- Q A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to a depth of 4.70 cm.(a) Use work and energy considerations to find the average frictional force that stops...
- Q A 63-kg skier (with gear) goes down a 500 meter slope which makes a 16 degree anglewith horizontal. They start with zero velocity.a. What is the gravitational potential energy the...
- Q After driving a portion of the route, the taptap is fully loaded with a total of 27 people including the driver, with an average mass of 61 kg per person....
- Q A 65 kg softball player slides into second base, generating 550 J of thermal energy in her legs and the ground.How fast was she running?
- Q How much energy is consumed by a 1.0 kW hair dryer used for 11 min?How much energy is consumed by a 12 W night light left on for 17 hr?
- Q A 3.25-kg block of silver is dropped from rest at a height of 75.0 meters. One-third of the potential energy is converted into hear energy which raises the temperature of...
- Q How much work does an elevator motor do to lift a 2000 kg elevator a height of 180 m ?How much power must the motor supply to do this in...
- Q A horizontal rope with 15 N tension drags a 25 kg box 6.5 m to the left across a horizontal surface.How much work is done by tension?How much work is...
- Q A box is pushed across a rough horizontal floor by a force acting parallel to the floor in the direction of motion. A force doing negative work on the body...
- Q Show that the kinetic energy of a particle of mass m is related to the magnitude of the momentum p of that particle by KE = p/2m. (Note: This expression...
- Q A frog of 0.15-kg mass jumps from the ground up to a height of 0.55 m.How much gravitational potential energy is involved in this jump?Here, the value of the acceleration...
- Q A string of length 'L' and force constant 'K' is stretched to obtain extension 'I'. It is further stretched to obtain extension '1'. The work done in second stretching is...
- Q Two particles A and B having different masses are projected from a tower with same speed. A isprojected vertically upward and B vertically downward. On reaching the ground: velocity of...
- Q An electric water heater consumes 6.38 kW for 3.85 h per day. What is the cost (in dollars per year) of running it for one year if electricity costs 12.6...
- Q The principle of conservation of energy implies that the amount of energy remains the same during a physical process. In this experiment energy after is less than energy before. This...
- Q You have a battery with voltage 8.85 V that you hook up to a single resistor. You measure a current of 0.509 Amps passing through the resistor. What is the...
- Q A block of mass m = 3.20 kg is pushed a distance d = 5.70 m along a frictionless horizontal table by a constant applied force of magnitude F =...
- Q 230-kg block along a horizontal track has a speed of 1.40 m/s immediately before colliding with a light spring of force constant 4.45 N/m located at the end of the...
- Q The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert a force of approximately 800 N as it contracts a distance of...
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