What is the difference between mass and weight?

• mass is how much matter is in an object, and weight is the gravitational pull on that object
• mass and weight are the same
• weight affects how much mass is in an object
• weight is determined by how many atoms make up an object

What is a force that opposes motion between two surfaces?

• friction
• acceleration
• velocity
• motion

which force produces a change in motion?

• unbalanced force
• balanced force
• gravitational force
• frictional force

Tags

NGSS.MS-PS2-2

Which describes velocity?

• Speed with direction
• The same thing as speed
• how fast something is moving

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Tags

NGSS.MS-PS2-1

__________ is the change in speed or direction of an object's motion.

• velocity
• acceleration
• force
• position

A train is traveling at a speed of 75 mph. Suddenly, it starts going faster. What caused the increase in speed?

• velocity
• inertia
• a force
• gravitation

Tags

NGSS.MS-PS2-2

What do you need to measure to find the speed of a moving car?

• distance and time
• speed and direction
• direction and time
• distance and momentum

Which example shows NO acceleration?

• going straight at a constant speed
• going straight while slowing down
• speeding up
• circling at at constant speed

which is the unit of measure for acceleration?

• m/s
• mph
• m/s²
• km/h