In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 42 m/s (around 90 mi/h) in a time of 7.3 s. The mass of the car and riders is 5700 kg. Find the average net force exerted on the car and riders by the mag...
A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 20.0 m. She pushes in a direction 28.0° below the horizontal. A 54.0-N frictional force opposes the motion of the cart.
A truck is traveling at a speed of 23.0 m/s along a level road. A crate is resting on the bed of the truck, and the coefficient of static friction between the crate and the truck bed is 0.610. Determine the shortest distance in which the truck can come to a halt without causin...
A man seeking to set a world record wants to tow a 106,000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 77 kg, and the coefficient of static friction between his shoes and the runway is 0.82. What is the greates...
A student took 100 mL of a solution of Mg(OH)2 and reacted it with HCl (aq) to calculate the concentration of hydroxide ions in the solution. If 13.75 mL of 0.010M HCl was used to react with all of the OH- (aq) in the 100-mL solution, what was the concentration of hydroxide io...
how do you construct a age pyramid. i have the age class and observed individuals how do i get the present in each age class
ok according to you the answer must be 1.5 but that is wrong :(
A 24.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 77.0 N and is directed at an angle of 30.0° above the horizontal. Determine the coefficient of kinetic friction.
but if you have two variables how do you solve? I understand that force=ma so the normal force is (284)(9.8)=2783.2, but I don't really understand how to determine when acceleration is .28
Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 284 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' force. If the buoyant for...