Motorcycle engine

The motorcycle engine has a constant power of 1.2 kW for 0.5 hours. How much work does the engine do? Express work in kWh and Ws units.

Correct answer:

W₁ =  0.6 kWh
W₂ =  2160000 Ws

Step-by-step explanation:

$$\begin{gathered} P=1.2\text{ kW } \\ t=0.5\text{ h } \\ {W}_1=P\cdot t=1.2\cdot 0.5=0.6\text{ kWh} \end{gathered}$$

$W_2=3600\cdot 1000\cdot W_1=3600\cdot 1000\cdot 0.6=2160000\text{ Ws}$

Try another example

Related math problems and questions:

• Motor physics
  A car is traveling at 98 km/h on the highway. The pulling power of the motor is 6 kN. Find the engine power in kW.
• Concrete column
  The concrete column of the highway bridge has the shape of a block with dimensions of 1m x 0.8m x 25m. It should be lifted by crane to a height of 20m. What is the power of his engine if the lifting takes 2 minutes?
• Electric work
  Calculate the work done by the electric forces passing the current of 0.2 A through the bulb in 10 minutes if the bulb is connected to a 230 V power supply.
• Bulb
  A 60 W bulb consumes 0.12 kWh of electricity. How long did she stand light without a break?
• Power input
  The construction lift lifted a load weighing 300 kg to a height of 12 m with a uniform movement. How long has it taken for the load to be lifted if the efficiency is 75% and the engine has a power input of 5 kW?
• Friction coefficient
  What is the weight of a car when it moves on a horizontal road at a speed of v = 50 km/h at engine power P = 7 kW? The friction coefficient is 0.07
• Three pumps together
  One pump fills the tank in 1.5 hours, the second in 2 hours, and the third in 3 hours 20 minutes. How many minutes will the tank fill with three pumps if they work simultaneously?
• Cooker
  A current of 2A passes through the immersion cooker at a voltage of 230V. What work do the electric field forces in 2 minutes?
• Two workers
  One worker needs 40 hours to do a job, and the second would do it in 30 hours. They worked together for several hours, then the second was recalled, and the first completed the job itself in 5 hours. How many hours did they work together, and how much did
• Electric input power
  Solve problems related to electric power: a) U = 120 V, I = 0.5 A, P =? b) P = 200 W, U = 230 V, I =? c) I = 5 A, P = 2200W, U =?
• Welders
  Welder do the job for six hours, the second one for 8 hours. How long do the job third welder if all together can do job in 2 hours?
• Linear system
  Solve a set of two equations of two unknowns: 1.5x+1.2y=0.6 0.8x-0.2y=2
• Bulbs and electricity
  In the sports hall, 875 identical light bulbs light for 2 hours. How long does it take for 100 such light bulbs to consume the same amount of electricity?
• Efficiency
  What is the power output of kettle 2 kW with efficiency 90%?
• Sorting ASC
  Which group of decimals is in order from least to greatest? A) 1.04, 0.39, 0.8, 2.1, 0.09 B) 2.1, 1.04, 0.39, 0.8, 0.09 C) 0.09, 0.39, 0.8, 1.04, 2.1 D) 0.09, 0.39, 0.8, 2.1, 1.04
• Engineer Kažimír
  The difference between politicians-demagogues and reasonable person with at least primary education beautifully illustrated by the TV show example. "Engineer" Kažimír says that during their tenure there was a large decline in the price of natural gas, pri
• The resistance
  What is the resistance of an aluminum wire 0.2 km long and 10 mm in diameter?