2. A car of mass 1000kg accelerates to 10ms (a) Calculate the gain in KE of the car. (b) If the engine is 50% efficient how much energy was put into the engine?
Q: A volcano spews a 350kg rock vertically upward to a height of 550m. (a) With what velocity was the…
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A: work done by external agent to lift the block is equal to negative work done by gravitational force…
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A: Conservation of energy theorem states that energy cannot be created or destroyed. It can only be…
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A: Average power is given by Instantaneous power is given by P = F × V Where F = Force applied on…
Q: . A steel ball falls from a table to the floor and then comes to rest. (a) What changes were taking…
A: A steel ball falls from a table to the floor and then comes to rest.
Q: Suppose that an engine has 28% overall efficiency. Find how much work is done in a time interval in…
A: The efficiency is defined as the ratio of work done to the input heat. η = WQin Where, W is the…
Q: A 54-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is…
A: Given:- mplayer= 50 kg vi= 10 m/s vf= 1.0 m/s yi= 0 m
Q: 5) Answer these two questions: a) List the energy conversions that occur when riding a bicycle. b)…
A: This is a question regarding the conservation of energy and the transformation of energy from one…
Q: 6. A truck weighing 1,000 kg runs at 120kph carrying a load of 1,200kg at its back. It travelled at…
A: Given, mass of truck is mt=1000kg the velocity of the truck vt=120kph mass of load is ml=1200kg…
Q: Calculate the kinetic energy in Joule, of a car of mass 1500kg travelling at 105km/h.
A: Mass of car: M = 1500 kg Speed of car: v = 105 km/h = 29.1667 m/s
Q: When jogging at 13 km/h on a level surface, a 70- kg man uses energy at a rate of approximately 850…
A: We know that:-Speed, v=13 km/h=13×10003600=3.6 m/sMass, m=70 kgEnergy at a rate, Pe=850 WattHuman…
Q: weight lifter hold 900N over his head. Is he doing work on weight? EXPLAIN.
A: The work done by the weight lifter can be given as, W=F.d Here, F denotes the force on the object is…
Q: When jogging at 13 km/h on a level surface, a 70- kg man uses energy at a rate of approximately 850…
A: Answer:
Q: A toy spring-loaded gun is used to launch a 50 g ball vertically to a height of 3 m. If the spring…
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Q: Sam leaps out of an airplane to see if he can fly but quickly finds he cannot. He has mass 90kg. ane…
A: Data provided: Initial velocity (u) = 0 m/s Mass (m) = 90 kg Height (h) = 30,000 m Air resistance…
Q: 2. Calculate the work done in the following cyclical system: P 3x105 exlos N/m? a lom3 5om? V
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Q: A man spends 2.4 kJ energy in displacing a body by 48 m in the direction in which he applies force…
A: Given, Work done by man, W = 2.4 kJ distance moved, d = 48 m time, t = 1.5 s
Q: 1. A 500 kg load is lifted to a height of 20 meters by means of a pulley block which has an…
A: Given information: Here, m is the mass of the load, h is the height up to which the load is to be…
Q: 3. A piece of shattered glass falls from the 82nd floor of a building. 600 feet above the ground.…
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Q: 1- An 18,000g object is accelerated at 2m / s', if the object is displaced 40m. What is the work…
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Q: An acce starting
A: According to work energy theorem Work done = change in kinetic energy
Q: You give a 5.0 kg box a quick shove up a ramp. It reaches a vertical height of 3.0 m before…
A: m = 5 kg h = 3 m vf = 0 m/s (Eth)f = 100 J g = 10 m/s2
Q: A power output of 18.0 h.p. is required to overcome friction and move a certain car at a constant…
A: The power required to move a body at a certain velocity is given by P = F×v, where F = the force…
Q: A 44-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is…
A: We must use conservation of energy in this question.
Q: 8. A 27-kg child, starting from rest, slides down a playground slide from a height of 3.0 m and…
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Q: A cheetah can accelerate from rest to 7.4 m/s (about 18 m/h) in 1.8 seconds. How much average power…
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Q: Q9. A 100 kW wind turbine operates at peak efficiency when the wind blows at 15.0 m/s At this rate,…
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Q: A man spends 3.2 kJ energy in displacing a body by 16 m in the direction in which he applies force…
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Q: A 41-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is…
A: Given, Mass is 41 kg, Initial speed is 11 m/s and final speed is 1.5 m/s
Q: A car with mass of 1138 kg accelerates from 0 m/s to 40.0 m/s in 10.0 s. Ingnore air resistance. The…
A: Solution: Given Values, Mass (m)=1138 Kginitial velocity(u)=0 m/sfinal velocity(v)=40…
Q: A single roller coaster cart with mass of 500kg is perched atop a 75m drop. It rolls down the hill…
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Q: A student drags a 3 kg box 5 m across a rough floor with a force of 40 N. A frictional force of 10 N…
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Q: 2) The roller-coaster cart starts moving downhill from position 1 at a height of 60m. It reaches the…
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Q: the ground. Due to the combined ford resistance and gravity, it has a speed when it reaches the…
A: Givenh=500 mv=40 m/s
Q: A 1250 kg sports car accelerates from zero to 30 m/s in 25 s. What is the average power delivered by…
A: Given : m = 1250 kg vo = 0 m/s v = 30 m/s t = 25 s
Q: Fill in the blank. You serve a volleyball with a mass of 2.1kg. The ball leaves your hand at 30m/s.…
A: Given:mass, m = 2.1 kgintial speed, u = 30 m/s
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