2R Form 2 Chapter 9 Speed and Acceleration

The formula for calculating speed is...(x means multiply; / means divide)

• time x distance

• distance x speed

• distance / time

• time / distance

Which of these is an example of negative acceleration (or deceleration)?

• a bird taking off for flight
• a baseball released by a pitcher
• a car approaching a red light
• an airplane following a straight flight path

A train that travels 100 kilometers in 4 hours is traveling at what average speed?

• 50 km/h
• 100 km/h
• 2 km/h
• 25 km/h

If a train traveling at 30 m/s brakes to a stop in 1 minute, its acceleration is _________.

• 30 m/s²
• 0.5 m/s²
• -0.5 m/s²
• -30 m/s²

Shona cycles at an average speed of 8km/h. How far has she traveled if she cycles for 4 hours?

• 55km
• 32km
• 43km
• 32miles

Tags

CCSS.7.NS.A.3

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

A snail can move approximately 0.30 meters per minute. How many meters can the snail cover in 15 minutes?

• 4.5 m
• 50 m
• 0.02 m
• 14 m

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 drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?

• 0 m/s
• 40 m/s²
• -40 m/s²
• 40 m/s

Rajan runs 200 m at a speed of 2 m/s and 300 m at a speed of 1.5 m/s. Find his average speed for the whole journey

• 1/3 m/s

• 2/3 m/s

• 1 2/3 m/s

• 3 2/3 m/s