Contact Forces Assessment

What is a force?

• A push or pull that can cause an object to move or change its motion.

• The mass of an object.

• The speed at which an object moves.

• The distance an object travels.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What happens to an object when a force is applied?

• It always speeds up.

• It always slows down.

• It may change its speed, direction, or shape.

• It remains unchanged.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

What is the difference between balanced and unbalanced forces?

• Balanced forces cause no change in motion, while unbalanced forces cause a change in motion.

• Balanced forces always move an object, while unbalanced forces stop motion.

• Balanced forces cause objects to stop, while unbalanced forces cause objects to start moving.

• There is no difference between balanced and unbalanced forces.

Tags

NGSS.MS-PS2-2

When a car brakes, what force is responsible for stopping it?

• Friction between the car's tires and the road.

• Gravity pulling the car downward.

• Air resistance slowing the car down.

• The car’s engine pushing the car forward.

Tags

NGSS.MS-PS2-2

What is the force of gravity?

• A contact force that pushes objects towards each other.

• A non-contact force that attracts objects towards the center of the Earth.

• A force that makes objects repel each other.

• A force that causes objects to stop moving.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

True or False: When two objects collide, they exert equal and opposite forces on each other.

• True

• False

Tags

NGSS.MS-PS2-1

Which of the following statements best describes Newton's First Law of Motion?

• An object will continue to move .

• The acceleration of an object is directly proportional to the net force and inversely proportional to its mass.

• For every action, there is an equal and opposite reaction.

• An object in motion stays in motion unless acted upon by a force.

According to Newton's First Law of Motion, an object at rest will remain at rest unless:

• It is acted upon by a net force.

• It gains momentum.

• Its mass is reduced.

• It is in free fall.

Which of the following is true about Newton's Second Law of Motion (F = ma)?

• The acceleration of an object is always in the opposite direction of the applied force.

• The force acting on an object is independent of its mass.

• If the mass of an object increases, the force required to move it will increase.

• The force required to move an object does not depend on its mass.

Tags

NGSS.MS-PS2-2

True or False: According to Newton's First Law, an object in motion will continue to move indefinitely without any external forces.

• True

• False