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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. $40m/s^2$
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

This question is a part of a group with common instructions. View group »

Weight is a measure of
2. the gravitational attraction between you and the earth.
3. mechanical equilibrium
4. all of these
5. none of these