Physics Quiz: Forces and Motion

What is Newton's first law of motion?

• An object in motion will eventually come to a stop

• An object at rest will start moving on its own

• An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• An object in motion will change direction without any force

Explain the difference between balanced and unbalanced forces.

• Balanced forces and unbalanced forces both cause a change in an object's motion

• Balanced forces and unbalanced forces have no effect on an object's motion

• Balanced forces cause a change in an object's motion, while unbalanced forces result in no change

• Balanced forces result in no change in an object's motion, while unbalanced forces cause a change in motion.

Draw a distance-time graph for an object moving at a constant speed.

• A straight line with a constant slope

• A horizontal line that gradually slopes upward

• A wavy line with random peaks and valleys

• A vertical line that suddenly drops down

According to Newton's second law of motion, what is the relationship between force, mass, and acceleration?

• Force = Mass - Acceleration

• Force = Mass + Acceleration

• Force = Mass x Acceleration

• Force = Mass / Acceleration

Give an example of balanced forces acting on an object.

• A car accelerating uphill

• A person lifting a heavy object

• Two people pushing a box with equal force in opposite directions

• A rocket taking off into space

How does Newton's third law of motion explain the interaction between two objects?

• The third law states that for every action, there is an equal and opposite reaction.

• The third law states that objects in motion tend to change direction

• The third law states that objects in motion tend to slow down

• The third law states that objects in motion tend to stay in motion

What are the characteristics of unbalanced forces acting on an object?

• Leads to a decrease in the object's speed

• Causes a change in the object's motion

• Causes the object to remain stationary

• Results in a balanced motion of the object

Interpret the distance-time graph of an object at rest.

• A diagonal line

• A vertical line

• A horizontal line

• A curved line

A bicycle rider is traveling up a hill. When the rider reaches the top of the hill, she stops to rest. Then she travels down the hill.

Which of these correctly describes the potential energy and the kinetic energy of the bicycle rider?

• When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic energy is the least.

• As the rider moves up the hill, her kinetic energy increases, and her potential energy decreases.

• When the rider goes down the hill, her potential energy increases, and her kinetic energy decreases.

• As the rider reaches the bottom of the hill, her kinetic energy and her potential energy decrease.

A girl on a bike rides down a hill 500 meters long in 50 seconds. What is her speed?

• 100 m/s

• 10 m/s

• 1,000 m/s

• 10 mph