Force And Motion Question Preview (ID: 41515)
Force, Motion, And Simple Machines.
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The principal's chair has wheels. It sits on her office floor next to her desk. She pulls the chair away from her desk. What makes her chair move?
a) the force of gravity on the chair
b) the force of her pull on the chair
c) friction between her hand and the chair
d) friction between the wheels and the floor
A student sets a block at the top of a wooden ramp. The student pushes the block. As the block slides down the ramp, it slows down and then comes to a stop. What forces cause the block to slow down?
a) the force of gravity
b) the force of friction
c) the force of magnetism
d) the force of the student's push
A student places a ball on the ground and kicks it. The ball moves along the ground. Why does the ball move?
a) The kick decreases the weight of the ball.
b) The kick applies a contact force to the ball.
c) The kick decreases the force of gravity acting on the ball.
d) The kick removes friction between the ball and the ground.
Three students are investigating force using a wagon. One students sits in the wagon, and another student moves the wagon by pulling it by the handle or pushing it from behind. Which of these would cause the wagon to move faster?
a) The wagon is pulled with less force.
b) The third student sits in the wagon.
c) The wagon is pushed with less force.
d) The third student helps push the wagon.
Which force causes a soccer ball to fall to the ground after it has been kicked up in the air?
a) erosion
b) friction
c) gravity
d) magnetism
A pencil falls off of a desk. What moves the pencil toward the floor?
a) mass
b) friction
c) gravity
d) speed
Which machine uses a wheel and axle?
a) hammer
b) seesaw
c) doorknob
d) scissors
A simple machine makes work easier because using it
a) takes less force to move something heavy
b) changes the weight of something heavy
c) improves the way something looks
d) lets something become a different shape
What type of simple machine is a doorknob?
a) wheel and axle
b) lever
c) inclined plane
d) pulley
What type of simple machine is a oar?
a) wheel and axle
b) lever
c) inclined plane
d) wedge
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