Chapter 4 Exam Review

• The acceleration of an object in free fall on the earth is _________.A. 9.4 m/s2

B. 9.4 m/s3

C. 9.8 m/s2

C. 9.8 m/s3

• Newton's first law of motion states that an object at rest tends to remain at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless it is acted upon by an unbalanced force. ________________ is the resistance an object has to a change in its state of motion.A. AccelerationB. InertiaC. FrictionD. Velocity

What two types of friction occur between two solid surfaces?A. The two types of friction that occur between

two solid surfaces are sliding and pushing friction.

B. Gravity and air pressure are the two types of friction that occur between two solid surfaces.

C. The two types of friction that occur between two solid surfaces are sliding and rolling friction.

D. Rolling and air pressure are the two types of friction that occur between two solid surfaces.

Assuming they are all traveling at the same speed, which of the following objects has the most inertia?A.a soccer ballB.a carC.a battleshipD.a bicycle

Complete Newton's First Law of Motion.An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by a(n) _________ force.A. oppositeB. circularC. balancedD. unbalanced

+-- = -----

• This diagram uses arrows and their size to represent the strength of a force. Apply what you know about net force to answer the following questions.Diagram A represents two forces __________ together, resulting in a(n)_________ force.– adding, balanced – adding, unbalanced – canceling, balanced – canceling, unbalanced

Which is NOT an example of an unbalanced force?A.a ball hitting a batB.running a mileC.shooting a jump shotD.a book sitting on a table

Which of the following statements is Newton's First Law of Motion?A. For every action, there is an equal and opposite

reaction.B. An object at rest tends to remain at rest while an object

in motion tends to remain in motion at the same speed and in the same direction.

C. An object in motion will stop easily and quickly if an opposite force is applied to it by another moving object of the same velocity and color.

D. The force acting upon an object can be described by the equation F = ma, where F is the force, m is the mass, and a is the acceleration.

According to Newton's First Law of Motion, an object in motion will continue moving at a constant speed and in a straight line unless acted on by an unbalanced force. On earth, objects in motion need constant force applied to remain in motion because of _____________ working against them.a. inertiab. frictionc. stasisd. momentum

• The upward force on an object falling through the air is ____.• a. air resistance• b. inertia• c. momentum• d. terminal velocity

• The relationship among mass, force, and acceleration is explained by ____.• a. conservation of momentum• b. Newton's first law of motion• c. Newton's second law of motion• d. Newton's third law of motion

• The greater an object's mass, the __________________ the gravitational force on it.

• A feather will fall through the air more slowly than a brick because of ____.• a. air resistance• b. gravity• c. inertia• d. momentum

• In the absence of air, a penny and a feather that are dropped from the same height at the same time will ____.• a. fall at different rates• b. fall at the same rate• c. float• d. not have momentum

• The acceleration due to gravity is ____.• a. 98 m/s2 c. 9.8 m/s• b. 9.8 m/s2 d. 0.98 m/s

•According to Newton's second law of motion, ____.• a. F = ma c. F = pa•b. F = mv d. F = pv

• When an object moves in a circular path, it accelerates toward the center of the circle as a result of ____.• a. centripetal force• b. frictional force• c. gravitational force• d. momentum

• The path of a projectile is ____.• a. curved•b. always horizontal• c. always vertical•d. straight

• The size of the gravitational force between two objects depends on their ____.• a. frictional forces• b. inertia• c. masses and the distance

between them• d. speed and direction

• As you get farther from the center of Earth, your weight will ____.• a. decrease• b. increase• c. remain the same• d. can't tell from information

given

A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. Assume the string breaks at point A. In which direction will the ball be traveling an instant later?a. direction a c. direction cb. direction b d. direction d

• A ball attached to a string is being swung in a clockwise circular path as shown in Figure 3-1. In which direction will the acceleration on the ball be when the ball passes point A?• a. direction a c. direction c

• b. direction b d. direction d

• An object that is in free fall seems to be ____.• a. not moving• b. slowed by air resistance• c. speeded up by air

resistance• d. weightless

• When two balls collide, the momentum of the balls after the collision is explained by ____.• a. the law of conservation of

momentum• b. Newton's first law of motion• c. Newton's second law of motion• d. Newton's third law of motion

• The statement "to every action there is an equal and opposite reaction" is ____.• a. the law of conservation of

momentum• b. Newton's first law of motion• c. Newton's second law of motion• d. Newton's third law of motion

• In the equation p = m ´ v, the p represents ____.• a. friction c. momentum

• b. inertia d. position