8th Grade unit Quiz

What is Net force?

• the force of gravity on an object.

• the total balance force acting on an object

• the velocity of an object

• the mass of an object

Calculate the net force acting on an object with a mass of 5 kg and an acceleration of 2 m/s².

• 10 N

• 7.5N

• 2.5N

• 15N

A car is experiencing a net force of 500 N in the forward direction, while another force of 200 N is acting in the opposite direction. What is the net force on the car?

• 500N

• 700N

• 300N

• 200N

Net force can be zero even if multiple forces are acting on an object.

• true

• false

Which of the following represents Newton's second law of motion?

• F = m × a

• F = m + a

• F = m / a

• F = m - a

In which direction will an object move if the net force acting on it is zero?

• forward

• backwards

• upwards

• it will not move

Calculate the net force acting on an object with a mass of 2 kg and an acceleration of 0 m/s².

• 2N

• 0N

Net force can change the speed or direction of an object

• true

• false

A ball is thrown vertically upwards. Which of the following forces is acting on the ball after it reaches its highest point?

• Gravity

• friction

• Buoyant Force

• No force

Calculate the net force acting on an object with a mass of 10 kg and an acceleration of 5 m/s²

• 5N

• 2N

• 50N

• 100N