How would decreasing the time it takes you to run a certain distance affect your speed?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.