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CH 3 Vocab
Test Description: CH 3 vocab
Instructions: Answer all questions to get your test result.
1) A push, pull, or other action that has the ability to change motion is called a (n)
A
Acceleration
B
Newton
C
free fall
D
Force
2) The inertia of an object is related to its:
A
mass only
B
mass and force
C
Mass and velocity
D
velocity only
3) Which of the following demonstrates Newton’s first law of motion?
A
A shopping cart at rest will stay at rest until pushed by a shopper
B
An object on the dashboard will continue moving forward when a car turns sharply
C
A magician is able to pull a tablecloth out from under dishes set on a table.
D
All of the above
4) The SI unit of force preferred by scientists is the:
A
newton (N)
B
liter (L)
C
pound (lb)
D
Kilogram (kg)
5) If the net force acting on a moving object is zero, the object will:
A
Continue in the same direction but change speed
B
Continue at the same speed but change direction
C
Continue in the same direction with no change in speed
D
Slow down and eventually stop
6) A ball with a mass of 1kg is moving is a straight line at the same speed as a ball with a mass of 10 kgs. Which of the following is true of the force required to stop the balls?
A
It takes less force to stop the 1kg ball because it ha
B
It takes more force to stop the 1 kg ball because it has more inertia
C
It takes less force to stop the 10 kg ball because it has less inertia
D
It take the same force to stop both balls because they are moving at the same speed
7) A car reaches a speed of 80 kilometers per hour, and then suddenly crashes into the concrete wall. Without a seatbelt, the crash test dummy slams into the car’s dashboard because:
A
The car has stopped, but the crash test dummy is still moving forward.
B
The momentum of the car is being transferred to the crash test dummy.
C
The dash is pushed backwards into the crash test dummy.
D
The crash test dummy’s kinetic energy drops to zero.
8) Is it possible for an object to move at constant speed without a force pulling or pushing it?
A
Yes, an object will move at constant speed unless a force acts to change its motion.
B
No, a constant force is needed to keep an object moving at constant speed.
C
No, a force is needed to keep an object moving at constant speed, but it doesn’t have to be a constant force.
D
Yes, an object will move at constant speed as long as the force inside the object doesn’t run out
9) The acceleration due to gravity is:
A
not a real force
B
the same for all objects
C
what makes a car slow down
D
More for objects with more mass
10) terminal velocity is:
A
how fast you can go
B
the same for a feather and a bowing ball
C
The maximum velocity reached by an object in free fall.
D
the speed of an airplane when it breaks the sound barrier.
*select an answer for all questions
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