Physics Questions?
1. An Airplane has a mass of 3.1 x 10^4 kg and takes off under the influence of a constant net force of 3.7 x 10^4 N. What is the net force that acts on the plane's 78 kg pilot?
2. An amusement park ride accelerates a car and it's riders from rest to 45 m/s in a time of 7.0 seconds. The mass of the car and riders is 5.5 x 10^3 kg. Find the average net force exerted on the car and riders.
3. A 15 gram bullet is fired from a rifle. It takes 2.5 x10^-3 secondsfor the bullet to travel the length of the barrel and it exits the barrel with a speed of 715 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted on the bullet.
4. A bowling ball (mass of 7.2 kg and a radius of 11 meters) and a billiard ball ( mass of 0.38 kg and a radius of 0.028 meters) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
5. A 35 kg crate rests on a horizontal floor and a 65kg person is standing on a crate. Determine the magnitude of the normal force that a.) the floor exerts on the crate and b.) the crate exerts on the person.