1.

DETAILS

MY NOTES

You decide to suspend a 2 kg toy with a string attached to theceiling for your playful cat. Before the frisky feline starts toplay with it, find the tension in the string.

N

2. Suppose a book of mass 4 kg slides down an incline atconstant velocity of 2 m/s. The net force on the book is...N

3.

DETAILSMY NOTES

Suppose a book of mass 3 kg slides down an incline at constantacceleration of 1 m/s^2. The net force on the book is

N

4.

DETAILSMY NOTES

Two horizontal forces (F1 and F2) are acting on a 3.7 kg box.Only F1 = 1.7 N is shown in the figure. As shown in the figure, apositive answer for F2 means that it points to the right (negativemeans it points to the left). Ignore friction. Find F2 when theacceleration of the box is 2 m/s^2.


N

5.

DETAILSMY NOTES

A car of mass 2050 kg traveling at speed 23 m/s crashes in a onedimensional collision into the rear of a slower moving truck ofmass  2875 kg traveling at 8.8 m/s in the same direction.If the collision is perfectly inelastic, what is the speed of thecombined car and truck after the collision?

m/s



A car of mass 2050 kg traveling at speed 23 m/s crashes in a onedimensional collision into the front of a slower moving truck ofmass  2875 kg traveling at 8.8 m/s in the oppositedirection. If the collision is perfectly inelastic, what is thevelocity of the combined car and truck after the collision?(Takethe positive direction to be the initial direction of thecar.)

m/s



A car of mass 2050 kg traveling at speed 23 m/s crashes into atruck of mass  2875 kg traveling at 8.8 m/s that falls(for some reason) vertically. If the collision is perfectlyinelastic, what is the velocity of the combined car and truck afterthe collision?(Take the positive direction to be the initialdirection of the car.)

m/s

6.

DETAILSMY NOTES

We are in a parallel universe where you have a mass of 70 kg. Inthese hard times (apparently the Corona virus is here too), youdecided to rob a bank and Spiderman caught you. Thats not good. Youtry to run away. Before Spiderman's spider string catches you, youare traveling at a speed of 4 m/s. The initial attachment of thespider string immediately slows you down to a speed of 1 m/s. Youare still running away, albeit slower. What is the magnitude of theimpulse you experience from the spider string.  

kg-m/s

7.

DETAILSMY NOTES

You slide your 1.5 kg beverage across the table. Thankfully, itdoesn't spill. If the coefficient of kinetic friction between thetable and beverage is 0.43, find the magnitude of the acceleration.(As a reminder, magnitude means your answer should bepositive.)

m/s^2

8.

DETAILSMY NOTES

A 11 kg package is sliding down a hill with an incline angle of21 degrees from a horizontal surface. If the package slides downthe hill at a constant velocity of 0.9 m/s, find the magnitude ofthe friction force. Yes, it is possible to solve this problemwithout the coefficient of kinetic friction; it arguably makes theproblem easier. (As a reminder, magnitude means your answer shouldbe positive.)

N

9.

DETAILSMY NOTES

With the exception of gravity and normal force, only thefollowing two forces are acting on a dresser of mass 11 kg movingacross a horizontal surface. Vector 1 has a magnitude of 2.6 withan angle from the horizontal of 36. Vector 2 has a magnitude of 2.1and an angle from the horizontal of 19 degree. Find theacceleration of the dresser.

m/s^2

10.

DETAILSMY NOTES

Cindy who is 58 kg pushes on Joe who is 72 kg. She pushes on Joewith a force of 108 N. With what magnitude of force does Joe pushon Cindy during that same push? (As a reminder, magnitude meansyour answer should be positive.)

N

11.

DETAILSMY NOTES

I lift my physics textbook a height of 1 m. What is the totalwork done on the book by all forces if I lift the book at aconstant velocity of 2.6 m/s. Ignore air resistance.

J

12.

DETAILSMY NOTES

A 1.6 kg ball is held at a height of 1 m above the ground. If itis dropped, what will its kinetic energy be immediately before ithits the ground? You may ignore air resistance.

J

13.

DETAILSMY NOTES

I apply a horizontal force of 159 N to a 1.2 kg box being pushedacross a horizontal surface. The coefficient of friction is 0.44.If the box is pushed 0.41 m, what is the work done by friction?Think carefully about what should be the sign of the worktoo.

J

14.

DETAILSMY NOTES

A treasure slides down a 48 meter tall incline with an inclineangle of 3.6 degrees at a constant speed of 0.21 m/s. What is theTOTAL work done on the treasure chest?

J

15.

DETAILSMY NOTES

A 17.5 kg object starts at the top of a 5.4 m tall hill at rest.At the bottom of the hill that it slid down, it has a velocity of2.5 m/s. What is the work done by friction? (As with the work doneby any force, I encourage you to think about what the sign of workdone by friction should be when inputting your answer.)

J

16.

DETAILSMY NOTES

My child has left a 3 kg toy on one of the bottom stairs at aheight of 1.3 m from the ground. After frustration that my childstill hasn't put the toy away, I throw it up the stairs to a heightof 3.4 m above the ground. What is the change in the potentialenergy that the toy experienced due to this throw?

J

17.

DETAILSMY NOTES

A 0.147 kg baseball is traveling at 16.9 m/s towards a baseballhitter. The baseball player hits the ball in the opposite directionfrom the pitch. The speed of the ball after the hit is 23.9 m/s. Ifthe time period of the ball in contact with the bat is 0.1 seconds,what is the magnitude of the force that the bat puts on theball?  

N

18.

DETAILSMY NOTES

An object of mass 10 kg has an x component of velocity of 5 m/sand a y component of velocity of 7 m/s. What is the magnitude ofthe total momentum of the object?  

kgm/s

PLEASE SHOW ALL WORK.