Atow truck exerts a force of 8000 n to move a car a distance of 4 m in 20 seconds. calculate the power of the tow truck.. 1. 0.01 w 2. 100 w 3. 1600 w

When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.

How is the ideal mechanical advantage of a wheel and axle calculated?