A lever has the following dimensions: Resistive force distance: 15 cm Effort force distance: 85 cm If you can exert a maximum effort force of 800 N, what is the maximum resistive force you can lift with the lever?

What mechanical work must you do to lift a uniform log that is 2.5 m long and has a mass of 140 kg from the horizontal to a vertical position?

A 55kg painter ascends a 12kg ladder. The painter begins to slip when she is 70% up the ladder. What is μs between the ladder and floor? (Assume wall is frictionless)

18. Two toy cars are pushed to the right. The first toy car is made of plastic, and has a low mass. The second toy car is made of metal, and has a larger mass than the first car. Both cars are pushed with the same force for the same distance. The friction on both cars is so small that it can be ignored. At the end of the push, how do the kinetic energies of the cars compare? a. The first, lower mass car has a larger kinetic energy. b. The second, higher mass car has a larger kinetic energy. c. The kinetic energies of the two cars are equal. d. Neither car has kinetic energy after the push is applied.