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You can create printable tests and worksheets from these Grade 12 Mechanics questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

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A 55 kg person walks up a staircase, and a second 55 kg person runs up the staircase. Who develops more power and why?
1. the person who walks up because he takes more time, using more energy
2. the person who runs up because he takes less time
3. same power for both because both cover the same distance with the same force
4. not enough information to determine
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.
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. $40m/s^2$
A force applied to a body is said to do "work"
1. if the body is displaced in the direction of the applied force.
2. if the body is displaced in the direction opposite to the applied force.
3. even if the body does not move.
4. only when the body is moving.
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

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Weight is a measure of