Question 1

A cyclist moves according to the velocity-time graph shown. If the cyclist starts at $$t = 0 s $$and stops at $$t = 40 s$$, what is the total distance the cyclist travels?

Accepted Answer

$$23 m$$

Question 2

A $$1000 kg $$car is traveling at $$9.6 m/s. $$What average net force is required to stop the car in $$6.0 s$$?

Accepted Answer

$$1.6 	imes 10^3$ N

Question 3

A $$0.25 kg $$ball falls vertically downward, hitting the floor with a speed of $$2.50 m/s $$and rebounding upward with a speed of $$2.25 m/s. $$What is the magnitude of the impulse delivered to the ball by the floor?

Accepted Answer

$$1.19 kg$$·m/s

Question 4

A $$4.5 kg $$ball, attached to the end of a horizontal cord, is rotated in a circle of radius $$1.3 m on a $$frictionless horizontal surface. If the cord will break when the tension is $$60.0 N$$, what is the maximum linear speed the ball can have?

Accepted Answer

$$13 m/s$$

Question 5

A $$60 cm $$diameter wheel accelerates uniformly from $$240$$ rpm to $$360$$ rpm in $$6.5 s. $$How far does a point on the edge of the wheel travel in this time?

Accepted Answer

$$56 m$$

Question 6

A $$7.0 kg $$block is held on a compressed vertical spring that has a spring constant of $$800 N/m. $$The spring is compressed a distance of $$0.18 m $$from its equilibrium position. Determine the maximum speed of the block as the moment the block is released.

Accepted Answer

$$1.6 m/s$$

Question 7

A $$15.4 kg $$lawnmower is at rest on a horizontal surface. The person applies a force of $$88.0 N at an $$angle of $$45.0^\circ$$ below the horizontal. If the coefficient of friction is $$0.56$$, what is the magnitude of the acceleration of the lawnmower?

Accepted Answer

$$0.83 m/s$^2$$

Question 8

A soccer ball is kicked with an initial speed of $$20.0 m/s at an $$angle $$25.0^\circ$$ above the horizontal. What is the ball's velocity $$2.0 s $$after being kicked?

Accepted Answer

$$17.7 m/s$^2$$ above the horizontal

Question 9

A $$5.1 kg $$block is held at rest against a spring compressed $$0.18 m. $$The spring constant is $$700 N/m. $$What is the speed of the block after it is released?

Accepted Answer

$$1.6 m/s$$

Question 10

A $$51.4 kg $$packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of $$35.0^\circ$$ above the horizontal. If the tension in the rope is $$115 N$$, how much work is done on the crate by the tension force, if the crate moves $$5.0 m$$?

Accepted Answer

$$471 J$$

Question 11

A shell slides without friction down a small, ice-covered hill. If the shell starts with a speed of $$1.0 m/s at $$the top and the height of the hill is $$2.0 m$$, what is the speed of the shell after moving down the hill?

Accepted Answer

$$6.3 m/s$$

Question 12

A block of mass $$m$$ and speed $$v$$ collides with a spring, compressing it a distance $$d. $$What is the effect on the spring's compression if the force constant of the spring is increased by a factor of four?

Accepted Answer

$$d/2$$

Question 13

A $$0.25 kg $$ball falls vertically downward, hitting the floor with a speed of $$2.50 m/s $$and rebounding upward with a speed of $$2.25 m/s. $$What is the magnitude of the impulse delivered to the ball by the floor?

Accepted Answer

$$1.19 kg$$\cdot m/s

Question 14

A $$2.0 kg $$block is held at rest against a spring compressed $$0.18 m. $$The spring constant is $$700 N/m. $$What is the speed of the block after it is released?

Accepted Answer

$$3.0 m/s$$

Question 15

A $$7.0 kg $$block is held on a compressed vertical spring that has a spring constant of $$800 N/m. $$The spring is compressed a distance of $$0.18 m $$from its equilibrium position. Determine the maximum speed of the block as the moment the block is released.

Accepted Answer

$$1.6 m/s$$

Question 16

A $$15.4 kg $$lawnmower is at rest on a horizontal surface. The person applies a force of $$88.0 N at an $$angle of $$45.0^\circ$$ below the horizontal. If the coefficient of friction is $$0.56$$, what is the magnitude of the acceleration of the lawnmower?

Accepted Answer

$$0.83 m/s$^2$$

Question 17

A $$1000 kg $$car is traveling at $$9.6 m/s. $$What average net force is required to stop the car in $$6.0 s$$?

Accepted Answer

$$1.6 	imes 10^3$ N

Question 18

A $$4.5 kg $$ball, attached to the end of a horizontal cord, is rotated in a circle of radius $$1.3 m on a $$frictionless horizontal surface. If the cord will break when the tension is $$60.0 N$$, what is the maximum linear speed the ball can have?

Accepted Answer

$$13 m/s$$

Physics 114 Practice Final Exam: Comprehensive Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드