Linear Motion

An object travels 15 meters in the first second of travel, 15 m in its second second, and 15m in the third second. Its acceleration is...

• 45m/s²
• 30m/s²
• 15m/s²
• 0m/s²

Tags

NGSS.HS-PS2-1

Suppose you take a trip that covers 180km in 3 hours. Your average speed is...

• 30km/hr
• 360km/hr
• 180 km/hr
• 60km/hr

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by

• 5m/s
• a variable amount
• about 10m/s
• about 15 m/s

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-1

If you drop a feather and a coin at the same time in a vacuum tube, which will reach the bottom of the tube first?

• the coin
• the feather
• neither, they will both hit at the same time
• it depends on the lentgh of the tube

Tags

NGSS.MS-PS2-4

A pencil lies on your desk. If the Earth is moving around the sun at a speed of 30km/s, how fast is the pencil moving relative to the desk? Relative to the sun?

• 0km/s, 0km/s
• 0km/s, 30km/s
• 30km/s, 0km/s
• 30km/s, 30km/s

Suppose a minivan is moving in a straight line and steadily increases it speed. It moved from 35km/hr to 40km/hr the first second, 40 to 45 the next second. What it it's acceleration? 

• 10km/hr/s
• 35km/hr/s
• 5km/hr/s
• 40km/hr/s

Tags

NGSS.HS-PS2-1

A ball is thrown straight up. At the top of its path it's instantaneous speed is...

• about 5m/s
• about 10 m/s
• about 20m/s
• 0m/s

A ball tossed vertically upward rises, reaches it highest point, and then falls back to its starting position. During this time the acceleration of the ball is always

• directed downward
• in the direction of motion
• directed upward
• opposite of its velocity

Tags

NGSS.HS-PS2-1

Suppose you are in a car that is going around a curve, the speedometer reads a constant 30mph. Whis is NOT true?

• Your speed is constant
• Your velocity is constant
• Your acceleration is constant
• Your acceleration is not changing

A freely falling object starts from rest, after falling for 15s it will have a speed of about...

• 750m/s
• 15m/s
• 150m/s
• 75m/s

Tags

NGSS.HS-PS2-1