Question

1. A pendulum of length 52 cm is pulled in an arc. The position at the top of the arc will measure 30cm from the vertical axis, when measured perpendicularly. The pendulum is released from rest. What will be its speed at the bottom of its swing? (draw a picture). Answer to 2 decimals.

2. A 250 gram mass is pressed up against a horizontal, open coil spring, on a smooth surface. The mass compresses the spring 38 cm and is then released. If the spring constant is 99 N/m, with what speed does the mass leave the spring? Answer to 2 decimals.

3. You lift a 16 N physics book up in the air a distance of 0.9 m, at a constant velocity of 0.3 m/s. What is the work done by gravity? Answer to 1 decimal.

Answer 1