A small car gets into a head on collision with an 18-wheeler. During the collision, which vehicle has a larger magnitude force acting on it? During the collision which vehicle's acceleration has the larger magnitude? Explain your answers.
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- (a) Find an equation to determine the magnitude of the net force required to stop a car of mass m, given that the initial speed of the car is v0 and the stopping distance is x . (b) Find the magnitude of the net force if the mass of the car is 1050 kg, the initial speed is 40.0 km/h, and the stopping distance is 25.0 m.What average force is required to stop a 1400 kg car in 8.0 s if the car is traveling at 85 km/h? Express your answer to two significant figures and include the appropriate units. Enter positive value if the direction of the force is in the direction of the initial velocity and negative value if the direction of the force is in the direction opposite of the initial velocity.A 863-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s when it reaches a speed of 20.0 m/s. What is the average force exerted on the car during this time? kN eastward
- A 821-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s when it reaches a speed of 30.0 m/s. What is the average force exerted on the car during this time?A 1370 kg jeep traveling at 19 m/s can be stopped in 24.0 s by gently applying the brakes. a) What is the average force exerted on the jeep in this case? b) If the driver slams on the brakes, the jeep stops in 2.10 s. What is the average force exerted on the jeep in this case? c) How much time will it take it stop if the driver coasts and lets a 300 N friction force stop the car?An SUV hauling a trailer is travelling at 20 m/s when the driver brakes. The 1.2 MT trailer isequipped with an in-cab controlled electronic handbrake with a braking force of 4000 N. If thebrake force applied to the 1.4 MT SUV is 5000N, what is the braking distance of both the SUV andthe trailer. Determine the force exerted by the trailer to the SUV.
- A car traveling at 27.2 m/s hits a bridge abutment. A passenger in the car, who has a mass of 65.0 kg, moves forward a distance of 57.0 cm while being brought to rest by an inflated air bag. Assuming that the force that stops the passenger is constant, what is the magnitude F of this force?10 of 31 Listen Study the scenario. A car is moving along a frictionless surface with a speed of 2 m/s to the left. You and your friend each come over and push the car at the same time. You exert a force of 6 N to the left, while your friend exerts a force of 6 N to the right. According to Newton's first law, how will this action affect the car's motion? The car will speed up because your force is in the same direction of the car's motion, making it speed up. The car will stop immediately because two balanced forces will cause an object to stop moving. The car will continue moving to the left but at a slower speed because your friend's force is going to make the car slow down. The car will continue to move 2 m/s to the left because there are balanced forces acting on it.A horizontal force of 5.0 N accelerates a 4.0-kg mass, from rest, at a rate of 0.50 m/s2 in the positive direction. What friction force acts on the mass?
- The air exerts a forward force of 10 N on the propeller of a 0.20 kg model airplane. If the plane accelerates forward at 2.0 m/s2, what is the magnitude of the resistive force exerted by the air on the airplane?In 1991, a lobster with a mass of 20.0 kg was caught off the coast of Nova Scotia, Canada.Imagine this lobster involved in a friendly tug of war with several smaller lobsters on ahorizontal plane at the bottom of the sea. Suppose the smaller lobsters are able to drag thelarge lobster, so that after the large lobster has been moved 1.55 m its speed is 0.550 m/s. Ifthe lobster is initially at rest, what is the magnitude of the net force applied to it by thesmaller lobsters? Assume that friction and resistance due to moving through water arenegligibleA 4768-kg roller coaster train full of riders approaches the loading dock at a speed of 17.1 m/s. It is abruptly decelerated to a speed of 2.20 m/s over a distance of 13.6 m. Determine the magnitude of the retarding force which acts upon the roller coaster cars.