Physical Science Final with Key

The units for momentum are

• kg
• m/s
• kg-m/s
• kg/m/s

Tags

NGSS.HS-PS2-2

The law of conservation of momentum states that, 

• p before is less than p after
• p before is the same as p after
• p before is more than p after

Tags

NGSS.HS-PS2-2

A 0.250 kg cart moving at 0.400 m/s has how much momentum?

• 0.1 kg-m/s
• 1 kg-m/s
• 10 kg-m/s
• 100 kg-m/s

Tags

NGSS.HS-PS2-2

When the speed of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.
• doubles
• quadruples
• decreases

Tags

NGSS.HS-PS2-2

Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.
• A 0.15 kg object rolling at 2 m/s.
• A 0.15 kg object rolling at 1 m/s
• A 0.4 kg object rolling at 2 m/s.

Tags

NGSS.HS-PS2-2

A runner has a momentum of 670 kg m/s and is travelling at a velocity of 9 m/s. What is his mass?

• 74.4 kg
• 6030 kg
• 0.0134 kg
• 80 kg

Tags

NGSS.HS-PS2-1

If 2 objects collide and stick together, what will happen to their velocities?

• velocities will increase
• velocities will decrease
• velocities will stay the same
• none of the above

Tags

NGSS.MS-PS2-1

What is the formula for calculating momentum?

• m=mv
• p=m/v
• p=v/m
• p=vm

Tags

NGSS.HS-PS2-2

The measure of the pull of gravity on an object is ___________________.

• motion
• weight
• speed
• friction

Which of Newtons laws explains why football teams have big, large, fast athletes.

• Frist and second
• second law
• first law
• Third law

Tags

NGSS.HS-PS2-1