Acceleration

Why does a car accelerate as it round a corner at a constant speed?

• Its direction changes
• It doesn't
• It slows down
• Its speeds up  

Tags

NGSS.MS-PS2-2

Acceleration only takes place when things speed up. 

• True
• False

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

In each of the following cases, determine where the car has no acceleration ?

• A car shortly after a stoplight turns green.
• A car approaching a red light
• A car with the cruise control set at 80 km/h
• A car turning a curve at a constant speed

Tags

NGSS.MS-PS2-2

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft

How can acceleration be zero?

• a car runs out of gas and slowly rolls to a stop
• a car decreases speed at a constant rate until it comes to rest
• car has constant speed and is traveling on a straight path
• the car travels round trip and is back at the starting point

Tags

NGSS.MS-PS2-2

What is velocity?

• the quickness of an object
• the location of an object
• acceleration
• speed in a specific direction

Calculate the average speed (in meter/sec) if a cheetah runs 180 meters in 10 seconds.

• 198 m/sec
• 170 m/sec
• 12 m/sec
• 18 m/sec

A value that only has magnitude (a number)

• Scalar
• Vector
• Speed
• Velocity

Of the following, which is a vector?

• Mass
• Time
• Speed
• Velocity

A correct measure of velocity would be

• 300 m/hr

• 7,800 m/sec

• 40 kn/hr north

Tags

NGSS.MS-PS3-1