Answer:
v = 17.5 m/s = 63 km/h
Explanation:
- The general expression for the kinetic energy of one moving object is as follows:
where m = mass of the object, v= speed of the object.
- In order to get the value of the kinetic energy of the truck in Joules, we need to convert km/hr to m/s first, as follows:
- Now, replacing (2) and m = 18000 kg in (1), we get:
- This value must be the same for the 2000 kg compact car, so we can write:
- Solving for v, we get: