Consider a 1,492 kg car cruising at constant speed of 59 km/h. Now the car starts to pass another car, by accelerating to 124 km/h in 9 s. Neglect air drag and friction and assume the road is level. By taking the entire car as the system and applying an energy balance, determine the additional power (kW) needed to achieve this acceleration to 1 decimal place. (note: 1 m/s = 3.6 km/h).

Consider a 1,492 kg car cruising at constant speed of 59 km/h. Now the car starts to pass another car, by accelerating to 124 km/h in 9 s. Neglect air drag and friction and assume the road is level. By taking the entire car as the system and applying an energy balance, determine the additional power (kW) needed to achieve this acceleration to 1 decimal place. (note: 1 m/s = 3.6 km/h).

Similar questions

When an automobile moves with constant speed down a highway, most of the power developed by the engine is used to compensate for the mechanical energy loss due to frictional forces exerted on the car by the air and the road. If the power developed by the engine is 148 hp, estimate the total friction force acting on the car when it is moving at a speed of 24 m/s. One horsepower equals 746 W.
A child of mass m = 25 kg starts from rest and slides without friction from a height h along a slide next to a pool. She is launched from a height into the air over the pool. (a) Using conservation of energy, find the speed of the child at the end of the slide. (b) Using your result of part (a) and eguations related to a projectile, find ymax as shown in the picture, in terms of h and 0. h Ymax th/5
A 27.0-kg child on a 4.00-m-long swing is released from rest when the ropes of the swing make an angle of 35.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest position. m/s (b) If the actual speed of the child at the lowest position is 3.30 m/s, what is the mechanical energy lost due to friction? Need Help? Read It
At Schlitterbahn, a 75.0 kg person rides a 12.0 m high water slide. If dissipative forces do -6.25 x 10³ J on the rider as they go from rest at the top of the ride to the bottom, then what is the speed of the rider at the bottom of the slide? Include a diagram of the situation and indicate the mechanical energy at both the top and at the bottom of the slide.
A hockey puck of mass 0.26 kg is sliding along a slippery frozen lake, with an initial speed of 64 m/s. The coefficient of friction between the ice and the puck is eventually causes the puck to slide to a stop. Find the work done by friction. J = 0.031. Friction
A 65.70 kg baseball player begins his slide into second base when moving at a speed of 6.090 m/s. The coefficient of friction between his clothes and the earth is 0.7480. How much work (in Joules) is done on the runner as he slides to a stop?
Consider an elevator car (lift) with a mass of 700kg which call carry up to 600kg of passengers. Use g = 10 ms. An electric motor is used to raise the elevator with a full load from the ground floor to the third floor, 9 m higher, in 30 s. Calculate the total energy needed and the power of motor required. 12 MJ and 2kW 12400 J and 2400 W 11700 J and 3900 W 48 kJ and 2400 W
A roller coaster starts with a speed of 4.1 m/s at a point 51 m above the bottom of a dip. Neglecting friction, what wil be the speed of the roller coaster at the top of the next slope, which is 30 m above the bottom of the dip? Answer: m/s
A 1.50 x 103-kg car starts from rest and accelerates uniformly to 16.9 m/s in 11.6 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. hp (b) Find the instantaneous power output of the engine at t = 11.6 s, just before the car stops accelerating. hp Need Help? Read It
A 1400 kg car delivers a constant 42 hp to the drive wheels. We assume the car is traveling on a level road and that all frictional forces may be ignored.Calculate the car's acceleration when its speed is 20 m/s
they asked us to use conservation of mechanical energy concepts for this question
Time yourself while running up a flight of steps, and compute the average rate at which you do work against the force of gravity. Express your answer in watts and in horsepower.