Unit Two: Forces & Newton (PhySci)

Student X pushes a 10-N box with a force of 2 N. At the same time, Student Y pushes the same box with a force of 6 N, but in the opposite direction. Which would most likely occur?

• The resultant force on the box would be 8 N.
• The resultant force on the box would be 18 N. 
• The box will move toward Student X.
• The box will move toward Student Y. 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A desk exerts an upward force of 1.5 N to a book lying on it. What force does the book exert on the desk?

• a downward force of 0.0 N
• a downward force of 1.5 N
• a downward force of 6.5 N
• a downward force of 15 N

Tags

NGSS.MS-PS2-2

A rock on Earth has a mass of 750 kg and a weight of 7,350 N. If the rock is taken into outer space, how will its mass and weight be affected?

• The weight and mass will remain the same because they are not altered by the effects of gravity

• The weight will remain the same, but the mass will change because of the effects of gravity

• The mass will be 76.5 kg, and the weight will increase because of the effects of gravity

• The mass will be 750 kg, but the weight will decrease because of the effects of gravity

As the wheels of a train move along the train tracks, what type of friction exists between the wheels and the tracks?

• fluid friction

• rolling friction

• sliding friction

• static friction

A 1,500-kg truck has a net force of 4,200 N acting on it. What is the truck’s acceleration?

• 6,300,000 m/s/s

• 2,700 m/s/s

• 2.8 m/s/s

• 0.36 m/s/s

This diagram shows a 40-kg object being pulled in one direction while friction acts on it in the opposite direction. What is the net force on the object?

• 160 N

• 140 N

• 120 N

• 20 N

Neclecting friction, what is the magnitude of force, F, if the object remains at rest?

• 6N

• 8N

• 14N

• 22N

A large rock has a mass of 750 kg. What is its weight?

• 76.5 N

• 740.2 N

• 759.8 N

• 7,350 N

A 100-kg student kicks a 1.5-kg ball with a force of 4.5 N, but the ball does not move. What force does the ball apply on the student?

• 4.5 N

• 6.75 N

• 1.50 N

• 450 N

What causes the balloon to move?

• action-reaction forces

• electrical forces

• friction

• gravitational potential energy