Linear Motion (Grades 11-12)
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Velocity is a quantity because it includes both and .
Speed is an always-positive quantity represented by a scalar.
What is the definition of acceleration?
- An object's resistance to motion
- How fast
- How much stuff (matter) is in an object
- The change in velocity over time
A car drives 12km east, then turns and drives 2km west. What is its displacement?
- 14km, east
- 10km, east
- 14km, west
- 10km, west
If a car travels 5 km in 2 minutes, what is its average speed?
- 30 km/hr
- 50 km/hr
- 100 km/hr
- 150 km/hr
If a car travels at an average speed of 50kms/hr, how much time would it take to complete a trip of 75 kilometers?
- 30 mins
- 50 mins
- 60 mins
- 90 mins
A body traveling at constant speed changes its direction without a change in its velocity.
If a body goes from 10m/s to 50m/s in 8 seconds, what is its acceleration?
An object's velocity is defined as its , which includes a direction and a magnitude.
If the acceleration of an object is negative, its velocity
- will be increasing.
- will be decreasing.
- will be zero.
- will be constant.