a)
Work done = kinetic energy
5460 = 0.5 m V^2
V = 2.04 m/s
b)
Work done = Fx displacement
5460 = Fx24
F = 227.5 N
A mechanic pushes a 2.60 times 10^3 kg car from rest to a speed of v,...
A mechanic pushes a 2.60 ✕ 103-kg car from rest to a speed of v, doing 4,950 J of work in the process. During this time, the car moves 20.0 m. Neglecting friction between car and road, find v and the horizontal force exerted on the car.
A mechanic pushes a 2.60 ✕ 103-kg car from rest to a speed of v, doing 4,770 J of work in the process. During this time, the car moves 20.0 m. Neglecting friction between car and road, find v and the horizontal force exerted on the car. (a) the speed v m/s (b) the horizontal force exerted on the car (Enter the magnitude.) N
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A man does 4,650 J of work in the process of pushing his 3.40 times 10^3 kg truck from rest to a speed of v, over a distance of 21.0 m. Neglecting friction between truck and road, determine the following. The speed v m/s the horizontal force exerted on the truck N A 0.42-kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B. What is its kinetic energy at A?...
A 1300-kg car, initially at rest, is initially accelerated at 4.9m/s2. After the car moves 550m, the engine is cut off. The car then moves a distance of 1230 before coming to a stop. Assume the road to be level and that g = 10 N/kg. a) What is in m/s, the magnitude of the velocity of the car at the end of the first 550m? b) What is in m/s2, the magnitude of the acceleration of the car while...
Constants A person pushes a 12.5 kg lawn mower at constant speed with a force of 81.0 N directed along the handle, which is at an angle of 45.0° to the horizontal Part A Draw the free-body diagram showing all forces acting on the mower. Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. + 2 O No elements selected We were unable to transcribe this imageConstants - Part B A...
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3. An engine exerts a force of 10000 N on a 1000 kg car travelling over a flat road. The force (overcoming friction) accelerates the car from rest such that it travels a distance of 50 m in 5 s Find e. the net acceleration of the car, f. normal force exerted by the road on the car, and g. the coefficient of kinetic friction between the car and the road? 4. A 10 kg block is initially at rest...
(a) Calculate the force needed to bring a 1050 kg car to rest from a speed of 95.0 km/h in a distance of 115 m (a fairly typical distance for a nonpanic stop). (b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a), i.e. find the ratio of the force in part(b)...
(a) Calculate the force needed to bring a 900 kg car to rest from a speed of 90.0 km/h in a distance of 100 m (a fairly typical distance for a nonpanic stop). N (b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a), i.e. find the ratio of the force in...