1 dimensional kinematics

what is the speed of an object at rest?

• 0.0 m/s

• 1.0 m/s

• 9.81 m/s

• -9.81 m/s²

Acceleration is

• displacement

• the rate of change of displacement

• velocity

• the rate of change of velocity

Tags

NGSS.HS-PS2-1

a vector is a quantity with

• magnitude and direction

• magnitude or direction

• magnitude only

• direction only

An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 10.0 s. What distance does the car travel?

• 150 m

• 196 m

• 336 m

• 392 m

• 421 m

Tags

NGSS.HS-PS2-1

A rock, released at rest from the top of a tower, hits the ground after 1.5 s. What is the speed of the rock as it hits the ground? (g = 9.8 m/s² and air resistance is negligible)

• 15 m/s

• 20 m/s

• 31 m/s

• 39 m/s

• 40 m/s

Tags

NGSS.HS-PS2-1

A Cessna aircraft has a lift-off speed of 120 km/hr. What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 240 m?

• 2.31 m/s²

• 3.63 m/s²

• 4.63 m/s²

• 5.55 m/s²

• 6.12 m/s²

Tags

NGSS.HS-PS2-1

What does this graph represent?

• Constant Speed
• Acceleration
• Not moving

Tags

NGSS.MS-PS3-1

According to the graph how far does the person travel in the first 5 seconds?

• 2 m
• 10 m
• 0 m
• 5 m

Tags

NGSS.MS-PS3-1

According to the graph how far does the person travel in the first 5 seconds?

• 2 m
• 10 m
• 0 m
• 5 m

What does the triangle, delta, $\Delta$  mean?

• change in speed

• change in velocity

• change in acceleration

• change in