PS.5.2 Force and Motion

Which of the following best describes the effect of gravity on an object?

• It pushes objects away from the Earth.

• It pulls objects towards the Earth.

• It has no effect on objects.

• It only affects objects in space.

Tags

NGSS.5-PS2-1

If a ball is rolling on a flat surface and gradually slows down, which force is primarily responsible for this change in motion?

• Gravity

• Friction

• Magnetism

• Air resistance

Tags

NGSS.MS-PS2-2

An object is moving at a constant speed in a straight line. What can be inferred about the forces acting on it?

• The forces are unbalanced.

• There are no forces acting on it.

• The forces are balanced.

• Gravity is not acting on it.

Which of the following scenarios demonstrates the effect of mass on motion?

• A feather and a rock falling at the same rate in a vacuum.

• A car accelerating faster than a truck with the same engine power.

• A ball rolling down a hill.

• A kite flying in the wind.

Tags

NGSS.MS-PS2-2

Calculate the speed of an object that travels 150 meters in 30 seconds.

• 3 m/s

• 5 m/s

• 4 m/s

• 6 m/s

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NGSS.MS-PS3-1

Which of the following best explains why a heavier object does not fall faster than a lighter object in the absence of air resistance?

• Gravity acts more on heavier objects.

• Both objects experience the same gravitational acceleration.

• Heavier objects have more friction.

• Lighter objects are affected by air resistance more.

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NGSS.MS-PS2-4

Which factor would increase the friction between two surfaces?

• Smoother surfaces

• Less contact area

• Greater mass pressing the surfaces together

• Lubrication between surfaces

Which of the following is an example of a balanced force?

• A book resting on a table.

• A car accelerating on a highway.

• A ball falling from a height.

• A kite being pulled by the wind.

What is the effect of increasing the mass of an object on its acceleration, assuming the force applied is constant?

• Acceleration increases.

• Acceleration decreases.

• Acceleration remains the same.

• Acceleration becomes zero.

Tags

NGSS.MS-PS2-2

Which of the following best describes inertia?

• The tendency of an object to change its motion.

• The tendency of an object to resist changes in its motion.

• The force that pulls objects towards the Earth.

• The force that pushes objects away from the Earth.