Chapter 3 Dynamics: Problems

The mass of a spaceship is 70 kg. It takes off from the moon with an upwards force of 500 N. The gravitational field strength on the moon is 1.6. (This is same as gravitational acceleration on Earth.) A.) What is the weight of the space craft? B.) What is the resultant force on the space craft? C.) What is the acceleration of the space craft?

A.) 112 N (W = 70 * 1.6) B.) 388 N (Resultant Force = 500 N - 112 N) C.) 5.54 m/s^2 (388 = 70 * a)

A car begins to drive down a straight road. For the first 10 seconds, the driver remains at a constant acceleration of 1.5 m/s^2. The mass of the car is 1.1 * 10^3 kg. A.) Calculate the driving force provided by the wheels when the force opposing the motion is negligible and when the total force opposing the motion of the car is 600 N. B.) Calculate the distance traveled by the car in the first 10 seconds.

A.) 1650 N, 1050 N B.) 150 m (Take the acceleration, multiply it by time to get the velocity. Take the velocity and multiply it by the time to get the distance, I think,)

Determine the speed in m/s of an object that travels: A.) 3μm in 5 ms B.) 6 km in 3 Ms C.) 8 pm in 4 ns

A.) 6 * 10^-4 B.) 2 * 10^-3 C.) 2 * 10^-3