Physics Practice Final

True or false: when the distance an object moves is zero the work done on the object is also zero.  

• True
• False

What is the potential energy done in lifting a 50kg barbell 5.8m above the floor?

• 50J
• 9.81J
• 2845J
• 58J

Tags

NGSS.HS-PS3-1

Belly-Flop Bernie dives from atop a tall flagpole into a swimming pool below. His potential energy at the top is 10,000J. What is his kinetic energy when his potential energy reduces to 9.7J?

• 9.81J
• 10,000J
• 9.7J
• 9,990.3J

Tags

NGSS.HS-PS3-1

What is the work done when a 20N force pushes a cart 3.5m?

• 70J
• 6.8J
• 23.5J
• 17.5J

Mechanical energy is equal to these two types of energy added together.

• kinetic and potental
• kinetic and electrical
• elastic and potential
• electrical and heat

Which of the following an insulator?

• copper
• wood
• silver
• salt water

Tags

NGSS.HS-PS2-6

A 9300 kg railroad car traveling at a velocity of 5 m/s strikes a second boxcar that weighs 5000 kg at rest. At what speed will the second boxcar move?

• 18.6 m/s
• 9.3 m/s
• 7.5 m/s
• 1.86 m/s

Tags

NGSS.HS-PS2-2

What is the net force?

• 40 N left
• 0 N Balalnced
• 400 N right
• 40 N right

Tags

NGSS.HS-PS2-1

What is Newton's Third Law?

• Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force
• Force = mass x acceleration
• For every action there is an equal and opposite reaction

Tags

NGSS.MS-PS2-1

What law is best described by inertia?

• 1st
• 2nd
• 3rd

Tags

NGSS.HS-PS2-1