Speed, Velocity, and Acceleration Review

Speed

100

A car travels 100 m in 20 s. What is its speed?

5 m/s

200

A train travels 300 km in 1.4 hours. What is its speed?

214.3 km/hr

300

A runner goes 400 m around the track at a speed of 8 m/s. How long did it take the runner to run that distance?

50 seconds

400

A bicyclist cycles at a speed of 0.4 m/s in 3 seconds. At what distance did the bicyclist go?

1.2 meters

500

A plane flies 1,500 km in 2.5 hours. What is that speed, but in meters/second? (Hint: convert km to m and hours to seconds.)

166.7 m/s

Velocity

100

A runner travels 50 m North in 10 seconds. What is their velocity?

5 m/s North

200

A car drives 240 m East in 12 seconds. What is its velocity?

20 m/s East

300

A skateboarder rolls 180 m from North to South in 15 seconds. What is their velocity?

12 m/s South

400

A hiker walks 1.5 km West in 25 minutes. What is the velocity in km/hr? (Hint: convert the minutes into hours. There are 60 minutes per hour, so the # of minutes needs to be divided by 60!)

3.6 km/hr West

500

A bike travels 2.4 km South in 6 minutes. What is its velocity in m/s? (Hint: Convert km to m and minutes to seconds.)

6.7 m/s

Acceleration

100

A car's speed changes from 0 m/s to 10 m/s in 5 seconds. What is its acceleration?

2 m/s²

200

A skateboard speeds up from 2 m/s to 6 m/s in 4 seconds. What is its acceleration?

1 m/s²

300

A ball rolls down a ramp, speeding up from 0 m/s to 12 m/s in 3 seconds. Find the acceleration.

4 m/s²

400

A car slows from 30 km/hr to 10 km/hr in 0.6 hours. What is the acceleration?

-33.3 km/hr²

500

The acceleration of a rollercoaster is 40 km/hr. Its initial velocity was 0 m/s forward and its final velocity was 100 km/hr. How many hours did it take to reach this acceleration?

2.5 hours.

S, V, or A?

100

6 m/s

Speed

200

7 km/hr²

Acceleration

300

1.2 mph West

Velocity

400

0.2 m/s forward

Velocity

500

-4.2 km/hr²

Acceleration

Formulas

100

What is the formula for speed?

S = D/T

200

What is the formula for velocity?

V = D/T + direction

300

What is the formula for acceleration?

A = (V_final - V_initial)/T

400

Rearrange the speed formula to solve for D (distance) instead of S (speed).

D = T x S

500

Rearrange the formula for acceleration so that you are solving for T (time). 

T = (V_final - V_initial)/A