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## Linear Motion

1.
Velocity is a                    quantity because it includes both                          and                         .

2.
Speed is an always-positive quantity represented by a scalar.
1. True
2. False
3.
What is the definition of acceleration?
1. An object's resistance to motion
2. How fast
3. How much stuff (matter) is in an object
4. The change in velocity over time

4.
A car drives 12km east, then turns and drives 2km west. What is its displacement?
1. 14km, east
2. 10km, east
3. 14km, west
4. 10km, west
5.
If a car travels 5 km in 2 minutes, what is its average speed?
1. 30 km/hr
2. 50 km/hr
3. 100 km/hr
4. 150 km/hr

6.
If a car travels at an average speed of 50kms/hr, how much time would it take to complete a trip of 75 kilometers?
1. 30 mins
2. 50 mins
3. 60 mins
4. 90 mins
7.
A body traveling at constant speed changes its direction without a change in its velocity.
1. True
2. False

8.
If a body goes from 10m/s to 50m/s in 8 seconds, what is its acceleration?
1. $1.25m/s^2$
2. $5m/s^2$
3. $6.25m/s^2$
4. $40m/s^2$
9.
An object's velocity is defined as its                                   , which includes a direction and a magnitude.
1. speed
2. distance/time
3. displacement/time
4. acceleration/time

10.
If the acceleration of an object is negative, its velocity                    .
1. will be increasing.
2. will be decreasing.
3. will be zero.
4. will be constant.
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