a car of mass 2.0*10^3 kg is initialy moving at 21 m/s when the brakes are applied and the car is brought to stop in 25m. Assuming the force that the stops the car is constant, find the magnitude of that force that stop the car?

A woman of 67 kg is held firmly in her seat by her seatbelt during a collision. The car deccelerates from 55km/h to 0.00km/h in 0.14s. Calculate the force of the seatbelt on the woman:

A truck of mass 2.40 * 103 kg is moving at 25.0 m/s. Whenthe driver applies the brakes, the truck comes a stop after traveling 48.0 m. What is the magnitude of the constant braking force that acts on the truck as it slows down?

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A truck hauls a car cross-country. The truck's mass is 4.00x103 kg and the car's mass is 1.60x103 kg. If the force of propulsion resulting from the truck's turning wheels is 2.50x104 N, then determine the acceleration of the car (or the truck) and the force at which the truck pulls upon the car. Assume negligible air resistance forces.

An object accelerates at 4m/s2 due to a 20N force applied to it. (a) What amount of force is needed to produce an acceleration of 2.0 m/s2 to the same object? (b) What amount of force is needed to produce an accelaration of 12m/s2 to the same object?   I ALREADY NEED IT PLEASE ANSWER?

a) a car traveling 79 km/h can brake to a stop in a distance d of 12m if the car is going 124 km/h what is it’s stopping distance? assuming the max braking force is approx independent of speed. b) a car traveling 42 km/h can brake to a stop in a distance d of 15m if the car is going 117 km/h what is it’s stopping distance? assuming the max braking force is approx independent of speed. c) a car traveling 46 km/h can brake to a stop in a distance d of 17m if the car is going 112 km/h what is it’s stopping distance? assuming the max braking force is approx independent of speed.

. A pickup truck with mass of 1230 kg moving at 105 km/h stops within a distance of 53.0 m. (a) What is the direction and size of the force that acts on the truck?   (b) How much more slowing force would be required to stop the truck in half the distance?

A car traveling at 60 km / h can brake and stop in a distance d = 20 m (figure a). If the car travels twice as fast, that is, 120 km / h, what will be the distance braking (figure b)? Assume that the maximum braking force is approximately regardless of its speed

A plane has a mass of M = 201 tons takes-off at a speed of Vf = 243 km/hr. If it starts form rest, what should be the minimum acceleration to take off if the length of the runway is L = 1.7 km