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Ch. 2 Forces Test
Test Description: Forces, newtons laws
Instructions: Answer all questions to get your test result.
1) A push or pull is called
A
motion
B
moving
C
walking
D
force
2) James combines all the forces acting on a tennis ball. He is finding the
A
inertia
B
net force
C
gravity
D
friction
3) Janet is sliding a box across the floor. What does she need to know to calculate the force on the box?
A
fricition and gravity
B
velocity and mass
C
mass and inertia
D
mass and acceleration
4) Inertia is the resistance of an object to a change in its
A
motion
B
gravity
C
acceleration
D
mass
5) A soccer player kicks a ball that is at rest. What do you predict will happen?
A
The ball will accelerate in the same direction as the applied force.
B
The ball will accelerate in the direction opposite the applied force.
C
The ball will not move.
D
The ball will lose momentum.
6) According to Newton's second law of motion, force equals mass times
A
gravity
B
acceleration
C
force
D
inertia
7) When you push on a door, the door pushes back with an equal and opposite force. These two forces are known as
A
mass and velocity
B
action/reaction pair
C
balanced/unbalanced pairs
D
motion/inertia
8) The momentum of an object is the product of its
A
mass and acceleration
B
inertia and mass
C
net force and mass
D
mass and velocity
9) Which of the following is an example of zero net force applied to an object?
A
a rope pulled equally from opposite ends
B
a ball being hit into the outfield with a bat
C
a skier moving down a mountain with increasing speed
D
a car turning left without changing speed
10) Newton's first law describes the tendency of objects to resist a change in motion. This resistance is also called
A
force
B
inertia
C
mass
D
gravity
11) Centripetal force keeps an object moving in a circle. This force points
A
toward the middle of the circle
B
upward from the circle
C
away from the circle
D
outward of the circle
12) . A bowling ball rolls down the lane and hits some pins before rolling off the lane. What happens to the momentum of the ball as it hits the pins?
A
. None of the ball's momentum is transferred to the pins
B
Some of the ball's momentum is transferred to the pins.
C
The pins stop the ball from rolling farther.
D
All of the ball's momentum is transferred to the pins.
13) Conservation of momentum occurs only when there are
A
balanced and unbalanced force pairs
B
no outside forces
C
gravity and friction
D
mass and inertia
14) The action force of a golf club hitting a ball accelerates the ball in one direction. Predict the direction in which the reaction force accelerates the club.
A
in the same direction
B
at right angles to the action force
C
upward away from the action force
D
in the opposite direction
15) You are standing in a crowded city bus. As the bus begins to move forward, you have a tendency to fall backward. Which of the following best explains this motion?
A
C. The motion is a result of action/reaction pairs. The forward motion of the bus causes an equal and opposite reaction of yo
B
A. When the bus is still, both you and the bus are at rest. As the bus moves forward, you stay at rest, resulting in a tenden
C
B. Your lesser mass causes you to be moved more easily. Thus, the force of the bus on you moves you backward
D
D. The motion is a result of balanced forces. The motion of the bus forward balances a backward force on you.
16) Which has the greatest inertia?
A
a baseball traveling at 95 mi/h
B
a cart loaded with large books
C
a car sitting at a traffic light
D
a jumbo jet airplane taxiing down a runway
17) The motion of an object can be changed by a(n)
A
large velocity
B
net force equal to zero
C
unbalanced force
D
balanced force
18) The child flying forward in a car accident because of less mass is an example of which law
A
1st law
B
2nd law
C
3rd law
19) A child flying forward in a car accident because of staying in motion when the car hits is an example of which law
A
2nd law
B
3rd law
C
1st law
*select an answer for all questions
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