24-25 Conceptual Physics Unit 3: Forces Test Prep

What category of force requires objects to be touching each other?

• Contact Forces

• Gravitational Forces

• Magnetic Forces

• Nuclear Forces

What is the significance of the net force?

• It is the total force acting on an object, determining its acceleration and direction of motion.

• It is the force that opposes motion, slowing down an object.

• It is the force that acts only when an object is at rest.

• It is the force that is always equal to the weight of an object.

What is the gravitational force between two objects dependent on?

• The masses of the objects and the distance between them

• The temperature of the objects

• The color of the objects

• The speed of the objects

What is the difference between contact forces and action-at-a-distance forces?

• Contact forces act over a distance without direct contact, while action-at-a-distance forces require physical contact between objects.

• Contact forces require physical contact between objects, while action-at-a-distance forces act over a distance without direct contact.

• Both contact forces and action-at-a-distance forces require physical contact.

• Contact forces and action-at-a-distance forces are the same and can be used interchangeably.

What force holds the planets in motion around the sun?

• Electromagnetic force

• Gravitational force

• Nuclear force

• Frictional force

What is the effect of friction on motion?

• Friction increases the speed of moving objects.

• Friction has no effect on motion.

• Friction opposes the motion of objects, acting in the opposite direction to the applied force.

• Friction only affects objects at rest.

What is Newton's First Law of Motion?

• An object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by a net external force.

• An object will accelerate in the direction of the net force acting on it.

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

• An object in motion will eventually come to a stop due to friction.

What is the relationship between mass and weight?

• Weight is the force of gravity acting on an object's mass, calculated as W = m * g, where g is the acceleration due to gravity.

• Mass is the amount of matter in an object, while weight is the volume of the object.

• Weight is independent of gravity and only depends on the object's size.

• Mass and weight are the same and can be used interchangeably.

What happens to the motion of an object if the net force is zero?

• The object will accelerate in the direction of the net force.

• The object will maintain its current state of motion, either at rest or moving at a constant velocity.

• The object will come to a stop immediately.

• The object will change its direction of motion.

How do you calculate acceleration?

• a = (final velocity - initial velocity) / time

• a = (initial velocity - final velocity) * time

• a = final velocity / time

• a = initial velocity + final velocity