What is the force of gravity on an object with a mass of 10 kg on Earth?

• 100 N

• 10 N

• 98 N

• 9.8 N

Tags

NGSS.MS-PS2-4

What does the term 'normal' mean in the context of normal force?

• Ordinary

• Parallel to the surface

• Perpendicular to the surface

• Equal to the gravitational force

Which direction does the tension force always act?

• Towards the object

• Away from the object

• Upwards

• Downwards

In which direction does the friction force act relative to the motion of an object?

• At an angle to the motion

• In the same direction

• Perpendicular to the motion

• Opposite to the motion

What is air resistance a form of?

• Gravitational force

• Normal force

• Tension force

• Friction force

What is the net force?

• A new type of force

• The sum of all forces acting on an object

• The force of gravity

• The normal force

Tags

NGSS.MS-PS2-2

If a box is pushed to the right with a force of 100 N and friction acts to the left with a force of 100 N, what is the net force in the X direction?

• 0 N

• 100 N to the right

• 200 N to the left

• 200 N to the right

Tags

NGSS.MS-PS2-2

What is the net force on a 20,000 N truck if the engine propels it forward with 7,500 N, the trailer pulls back with 5,000 N, and it experiences 2,000 N of air resistance?

• 4,500 N to the right

• 500 N to the left

• 500 N to the right

• 4,500 N to the left

Tags

NGSS.MS-PS2-2

How do you calculate the weight of a 50 kg parachuter on Earth?

• 50 kg

• 500 N

• 50 N

• 490 N

Tags

NGSS.MS-PS2-4

Why is there no normal force acting on a parachuter in free fall?

• Because the gravitational force is too strong

• Because the normal force is balanced by air resistance

• Because the parachuter is moving too fast

• Because the parachuter is not touching any surface

Tags

NGSS.MS-PS2-5