Final Review - Physics

If it is known that an unbalanced force is acting on an object, then which of the following must be assumed regarding the object's motion?

• The object is at rest.
• ]The object is moving with a constant velocity.
• The object is accelerating.
• The object is at equilibrium.

Tags

NGSS.MS-PS2-2

Find the acceleration of the object.

• 0.5 m/s
• 2 m/s
• 12 m/s
• 144 m/s

Tags

NGSS.MS-PS2-2

At the moment a 85 kg skydiver pulls his parachute, he experiences 900 N upward force due to air resistance. Find the net force.

• 67 N
• 85 N
• 815 N
• 833 N

Tags

NGSS.MS-PS2-2

A net force of 250 N is applied to an object that accelerates at a rate of 5 m/sec². What is the mass of the object?

• 50 kg

• 245 kg

• 0.02 kg

• 1250 kg

Tags

NGSS.MS-PS2-2

What is the F_grav on a car of mass 1500 kg?

• 1500 N

• 14700 N

• 153.06 N

• 0 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What happens to the force of gravity if the separation distance is tripled?

• F_g decreases to 1/3 of the original magnitude

• F_g increases to 1/3 of the original magnitude

• F_g decreases to 1/6 of the original magnitude

• F_g decreases to 1/9 of the original magnitude

Tags

NGSS.HS-PS2-4

The greater the mass of an object -

• the easier the object starts moving
• the more space it takes up
• the greater its inertia
• the more balanced it is.

Tags

NGSS.MS-PS2-2

What does this graph represent?

• Constant speed
• Acceleration
• Not moving
• Return to start

What is this object doing?

• speeding up
• slowing down
• not moving
• moving at a constant velocity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Calculate the speed of the object from this position vs. time graph

• 10 m

• 10 m/s

• 10

Tags

NGSS.MS-PS3-1