Force And Motion Question Preview (ID: 62745)
Force And Motion Unit Test Review.
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Which two measurements are needed to determine the speed of an object?
a) position and time
b) distance and time
c) position and direction
d) distance and direction
Which unit would be most appropriate to measure the length of the bowling lane?
a) meters
b) kilometers
c) millimeters
d) centimeters
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 ball moves before the forces can cancel out.
b) The forces become unbalanced due to air resistance.
c) The force on the ball is greater than the force on the foot.
d) The forces are exerted on different objects so they are not balanced forces.
Which of the following describes an object moving in a circle steadily?
a) change in speed only
b) change in direction only
c) no change in speed or direction
d) change in speed and change in direction
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) friction
b) gravity
c) air resistance
d) parachute pull
Why is the friction force considered to be a contact force?
a) Friction affects only solid objects.
b) Friction always acts in the same direction.
c) Friction is produced when objects slide past one another.
d) Friction acts in a direction opposite to the direction of an object’s motion.
What do the length and the direction of the arrows in a force diagram represent?
a) The amount of force and the direction of the force acting on the box.
b) The direction of the force acting on the box
c) The amount of force acting on the box.
d) The velocity of the box.
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
How can you tell that forces in a force diagram are unbalanced?
a) You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
b) You can tell because the perpendicular forces will be different. Ex. 50 N up and 25 N left
c) You can tell because the perpendicular forces will be equal. Ex. 25 N up and 25 N left
d) You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
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 50 N to the left. The box will move to the left.
c) There is a net force of 25 N to the left. The box will move to the left.
d) There is a net force of 25 N to the right. The box will move to the left.
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