Phy Sci U 12 Practice

Force of gravity pulling an object down is ______.

• mass

• velocity

• weight

• volume

Tags

NGSS.MS-PS2-4

If a bowling ball and a tennis ball are released at the same time to fall through the air, which statement below is true?

• both balls will hit the ground at the same time.

• the bowling ball will hit the ground first

• the tennis ball will hit the ground with more force

• the bowling ball will have a greater acceleration because of gravity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A parachute helps someone fall slower because it

• has a lot of surface area so there is less air resistance

• has a lot of surface area so there is more air resistance

• makes the man reach a faster terminal velocity

• makes the mass of the man decrease

Tags

NGSS.MS-PS3-5

On the moon where there is no atmosphere, a feather and a baseball dropped from the same height at the same time will ______.

• fall at different speeds

• float

• fall at the same speed

• have no momentum

Tags

NGSS.MS-PS2-4

The path of a projectile is always _______.

• straight

• curved

• controlled only by gravity

• only vertical

Acceleration of a falling object due to gravity on earth is

• 9.8 or approximately 10 m/s

• 9.8 or approximately 10 m/s²

• 980 or approximately 1000 m/s²

• 0.98 or approximately 1 m/s²

Tags

NGSS.MS-PS2-4

The force that opposes motion between two surfaces is _____.

• centripetal

• gravitational

• friction

• velocity

If the force of air pushing up on a falling object equals the force of gravity pulling down on the object, the falling object will reach _____

• final velocity

• equilibrium

• terminal velocity

• average speed

Tags

NGSS.MS-PS2-2

The friction between the tire of a moving car and the pavement is ______ friction.

• static

• sliding

• rolling

• permanent

A loaded truck moving at 25 m/s will have more momentum than an unloaded truck moving at 25 m/s because ____.

• the loaded truck has less friction

• the loaded truck has more mass

• the unloaded truck has more speed

• the loaded truck has more speed

Tags

NGSS.HS-PS2-2