R1 - 4.00

M

- V = 12.0 V

Т.

1. Using Ohm's Law, Calculate the current / flowing

through the circuit in Figure 1.

Show all work.

A car drives over the top of a hill that has a radius of 30 m. part a what maximum speed can the car have without flying off the road at the top of the hill?

Suppose that you are riding a bike away from your dog who sits and watches you leave. If you use the bicycle as a reference frame, how does your dog appear to move?

An 18.8 kg block is dragged over a rough, horizontal surface by a constant force of 156 N acting at an angle of angle 31.9◦ above the horizontal. The block is displaced by 19.9 m, and the coefficient of kinetic friction is 0.209. a.

What does displacement depend on

An 8000-n car is traveling at 12 m/s along a horizontal road when the brakes are applied. the car skids to a stop in 4.0 s. how much kinetic energy does the car lose in this time?

A father racing his son has 1/3 the kinetic energy of the son, who has 1/2 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son

A 2 kg book is pushed across a table is a force 4. Assuming no friction, what is the acceleration of the book?

When electricians use wiring for houses they use both copper and rubber. Which do you think is used as a conductor?

Suppose that 600 W of radiation in a microwave oven is absorbed by 250 g of water in a very lightweight cup. Approximately how long will it take to heat the water from 20 C to 80 C? (A) 50 s (B) 100 s (C) 150 s (D) 200 s

Calculate the velocity of a 1650kg satellite that is in a circular orbit of 4.2 x 10^6m above the surface of a planet which has a radius 3.95 x 10^5 m and the period of the orbit is 2.0 hours.