Question

1. How much energy is consumed by a 12 W night light left on for 15 hr?

2. The spring shown in the figure is compressed 45 cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student's coefficient of kinetic friction on the 30∘ incline is 0.20 .

Part A: What is the student's speed just after losing contact with the spring? Express your answer to two significant figures and include the appropriate units.

Part B: How far up the incline does the student go? Express your answer to two significant figures and include the appropriate units.

3. A 100 g particle experiences the one-dimensional, conservative force Fx shown in the figure(Figure 1).

Part B: Suppose the particle is shot toward the right from x = 1.0 m with a speed of 22 m/s. Where is the particle's turning point? Express your answer with the appropriate units.

Answer 1