1. In a hydraulic lift, if you exert a downward force of 100 N on a piston with an area of 1 m^3, how much upward force would be exerted on a piston with an area of 20 m^3?

2. What would be the absolute pressure at a depth of 2 m in a swimming pool? (Density of water is 1000 kg/m^3, density of air is 1 kg/m^3, use 10.0 m/s^2 for acceleration of gravity)
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Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy