Kinematics (acceleration 2)

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.HS-PS2-1

A golf ball accelerates off a tee at 15m/s², changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?

• 750 seconds
• 35 seconds
• 0.3 seconds
• 3.3 seconds

Tags

NGSS.HS-PS2-1

A bicyclist begins moving with a velocity of 10 m/s and then decreases his velocity to 6 m/s in 2 seconds. What is the acceleration of the bicyclist?

• 4 m/s²
• -4 m/s²
• 2 m/s²
• -2 m/s²

Tags

NGSS.HS-PS2-1

A dog runs with an initial speed of 7.5 m/s on a waxed floor.  It slides to a stop in 15 seconds.  What is the acceleration?

• -7.5 m/s
• -7.5 m/s²
• -0.5 m/s²
• 7.5 mi//hr

Tags

NGSS.MS-PS2-2

A fish swam 500m. He started from rest and reached a top speed of 5m/s. What is the fish's acceleration?

• 0.025 m/s2

• 50 m/s2

• 5 m/s2

• 10 m/s2