IA Review - Force & Motion and Simple Machines

A boy is pulling his little sister in a wagon. If his older brother comes along and they pull on the wagon together, how will this increase in force affect the motion of the wagon? (Choose the best answer)

• It will accelerate

• It will change direction

• It will continue unchanged

• It will remain at rest

Tags

NGSS.MS-PS2-2

A train is moving along a track. If the forces acting on the train are balanced, how will its motion be affected? (Choose the best answer)

• Change direction

• Continue, unchanged

• Speed Up

• Stop

Tags

NGSS.MS-PS2-2

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

• Gravity is stronger than the pull force

• Friction is too strong

• Forces are balanced

• Forces are unbalanced

A girl is riding her bike on a smooth bike path. She starts on level ground. When she gets to a hill, she has to peddle harder to go the same speed. Why does this happen? (Choose the best answer)

• There is more wind resistance on the hill.

• Her bike is slipping backwards down the hill.

• The force of gravity is slowing down her bike.

• The friction on a hill is more than on level ground.

Tags

NGSS.MS-PS2-2

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When an object is in motion, what direction does friction act in?

• The same direction as the motion of the object

• At right angles to the motion of the object

• The opposite direction to the motion of the object

What are balanced forces?

• Forces where the effect of one force is equal to another

• Forces where the effect of one force is larger than another

• Forces measured using a Newton balance

What causes 'changing motion'?

• Balanced forces

• Unbalanced forces

• Steady motion

Tags

NGSS.MS-PS2-2

Which statement best describes weight?

• A measure of the amount of matter inside an object

• A measure of any acceleration acting on an object

• A measure of the force of gravity acting on an object

Tags

NGSS.MS-PS2-2

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The amount of matter in an object is called its

• balance

• newtons

• weight

• mass

The force that one surface exerts on another when the two rub against each other is called

• gravity

• motion

• friction

• push or pull