a) A car weighs 1500kg, if it is travelling at 7m/s, how much kinetic energy does it have?
To determine the kinetic energy of the car, we need to use the formula for kinetic energy. The formula is KE=(1/2)mv^(2) where m is the mass of the object (in kg) and v is the speed of the object (in meters per second, which is often written as (m/s)).
In the case we are looking at, our object is the car, the mass, m = 1500kg and the speed, v = 7m/s. Plugging these values into the formula for kinetic energy and using our calculator we get the following:
KE = (1/2)mv^(2) = (1/2)1500(7^(2)) = 36750J
WS
Related Physics GCSE answers
All answers ▸A note was played on a a keyboard. The frequency of the note was 440 Hz. (a) What does a frequency of 440 Hz mean? (b) The sound waves produced by the keyboard travel at a speed of 340 m/s. Calculate the wavelength of the note.
What is are elastic and inelastic collisions?
Assuming no friction, describe the motion of a simple pendulum released from rest at t=0 at amplitude A? Provide information about its speed and position at characteristic times during one period. [The 1D equation of motion is described by a cosine]
An electric Iron rated at 2600 W contains a steel plate, heated to a working temperature of 215°C. Room temp=18°C. Deduce whether the plate could reach its working temperature in less than 1 minute. Mass (steel plate)=890g & C (steel)=450J/kg/K