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 with a constant velocity. What can be said about the net force acting on the car?

• It is increasing

• It is decreasing

• It is zero

• It is equal to the weight of the car

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

• 3 m/s²

• 5 m/s²

• 10 m/s²

• 15 m/s²

Which of the following is an example of Newton's third law of motion?

• A book resting on a table

• A car accelerating on a highway

• A rocket launching into space

• A ball rolling down a hill

A 10 kg box is pushed with a force of 50 N. If the frictional force opposing the motion is 20 N, what is the net force on the box?

• 20 N

• 30 N

• 50 N

• 70 N

What is the net force acting on an object if it is moving at a constant speed in a straight line?

• Greater than zero

• Less than zero

• Zero

• Equal to the gravitational force

A 2 kg object is accelerating at 3 m/s². What is the net force acting on the object?

• 3 N

• 6 N

• 9 N

• 12 N

Which of the following statements is true according to Newton's second law of motion?

• Force is equal to mass times velocity

• Force is equal to mass times acceleration

• Force is equal to mass times speed

• Force is equal to mass times distance

A 15 kg object is at rest on a horizontal surface. What is the net force acting on the object?

• 0 N

• 15 N

• 150 N

• 9.8 N