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Force And Motion
Test Description: Force and Motion Unit test review
Instructions: Answer all questions to get your test result.
1) Which two measurements are needed to determine the speed of an object?
A
distance and direction
B
distance and time
C
position and direction
D
position and time
2) Which unit would be most appropriate to measure the length of the bowling lane?
A
kilometers
B
millimeters
C
meters
D
centimeters
3) A soccer player kicks a ball. According to Newton’s third law of motion, the player’s foot exerts a force on the ball. The ball exerts a force on the foot. Why don’t the forces cancel out to result in a net force of zero?
A
The force on the ball is greater than the force on the foot.
B
The forces become unbalanced due to air resistance.
C
The forces are exerted on different objects so they are not balanced forces.
D
The ball moves before the forces can cancel out.
4) Which of the following describes an object moving in a circle steadily?
A
change in speed and change in direction
B
change in direction only
C
no change in speed or direction
D
change in speed only
5) A skydiver jumps out of a plane. She falls downward at a very fast speed. When she opens her parachute, she slows down. What force pulled the skydiver to the ground?
A
gravity
B
air resistance
C
parachute pull
D
friction
6) Why is the friction force considered to be a contact force?
A
Friction acts in a direction opposite to the direction of an object’s motion.
B
Friction is produced when objects slide past one another.
C
Friction always acts in the same direction.
D
Friction affects only solid objects.
7) What do the length and the direction of the arrows in a force diagram represent?
A
The amount of force acting on the box.
B
The velocity of the box.
C
The direction of the force acting on the box
D
The amount of force and the direction of the force acting on the box.
8) How can you tell that forces in a force diagram are balanced?
A
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
B
You can tell because the perpendicular forces will be equal. Ex. 25 N up and 25 N left
C
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
D
You can tell because the perpendicular forces will be different. Ex. 50 N up and 25 N left
9) How can you tell that forces in a force diagram are unbalanced?
A
You can tell because the perpendicular forces will be equal. Ex. 25 N up and 25 N left
B
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
C
You can tell because the perpendicular forces will be different. Ex. 50 N up and 25 N left
D
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
10) If a ball has 50 N of force pushing from the left and 25 Newtons of force pushing from the right, what is the motion of the box?
A
There is a net force of 50 N to the left. The box will move to the right.
B
There is a net force of 25 N to the left. The box will move to the left.
C
There is a net force of 25 N to the right. The box will move to the left.
D
There is a net force of 50 N to the left. The box will move to the left.
*select an answer for all questions
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