Understanding Forces and Motion

A 5 kg object is subjected to a net force of 20 N. What is the acceleration of the object?

• 2 m/s²

• 4 m/s²

• 5 m/s²

• 10 m/s²

According to Newton's first law, an object at rest will remain at rest unless acted upon by a:

• Balanced force

• Net force

• Gravitational force

• Frictional force

A car is moving at a constant velocity. Which of the following statements is true?

• The net force on the car is zero.

• The car is accelerating.

• The car is decelerating.

• The car is experiencing a net force.

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

• Gravitational force

• Magnetic force

• Frictional force

• Electrostatic force

If a force of 15 N is applied to a 3 kg object, what is the acceleration of the object?

• 3 m/s²

• 5 m/s²

• 7 m/s²

• 10 m/s²

Newton's third law states that for every action, there is an equal and opposite:

• Reaction

• Force

• Motion

• Acceleration

• 49 N

• 98 N

• 100 N

• 120 N

Which of the following forces acts perpendicular to the surface of contact?

• Frictional force

• Tension force

• Normal force

• Gravitational force

A force of 30 N is applied to a 6 kg object. What is the net force if there is a frictional force of 10 N opposing the motion?

• 10 N

• 20 N

• 30 N

• 40 N

Which of the following is a non-contact force?

• Tension force

• Frictional force

• Gravitational force

• Normal force