Forces and Motion Experiments

A student uses a toy car and ramp to investigate how surface affects the speed of a rolling object. What should the student intentionally change when doing this experiment?

• The color of the toy car

• The distance the toy car travels

• The material on which the toy car rolls

• The weight of the toy car

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Which two tools should be used together to measure speed?

• Balance and spring scale

• Clock and measuring tape

• Meter stick and stopwatch

• Ruler and graduated cylinder

The table in the picture contains results of an experiment testing which object would travel the farthest when sliding down a ramp. Which object had the least amount of friction while sliding down the ramp?

• calculator

• checker

• pop cap

• quarter

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Which of the following is an example of movement caused by a non-contact force?

• foot kicking a soccer ball

• paperclips being pulled by a magent

• shoes rubbing against the floor

• wind pushing against a kite

Tags

NGSS.MS-PS2-5

Which describes a contact force?

• a magnet pulling a paper clip towards it

• air pushing a sailboat

• an electrical field

• gravity pulling down a baseball

A student shoots a basketball. Which non-contact force causes the ball to come down as it arches towards the basket?

• Friction between the ball and the air

• gravity pulling the ball towards Earth

Tags

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The diagram in the image represents a pulley system. There is a tennis ball attached at one end of the string and a hook that can hold washers at point A.

If washers, equal to the weight of the tennis ball, are attached to hook (A), what will happen to the tennis ball?

• It will bounce on the ground

• It will move up

• it will not change position

• It will vibrate

Tags

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A train is moving along a track. if the forces acting on the train are balanced, how will its motion be affected?

• change direction

• continue, unchanged

• speed up

• stop

Tags

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Two classes are playing tug-of-war. If the center of the rope is not moving, what must be true?

• both classes are pulling equally

• both classes have equal mass

• the forces are balanced

• one class is pulling harder than the other

A class is testing fan-powered sailboats. If the students increase the speed of the fan blowing on the sail, what will happen to the movement of the boat?

• it will stop

• it will accelerate

• it will change direction

• it will travel a shorter distance

Tags

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