Question #123a1
1 Answer
a) 30kg mass (b)mass at 75m/s (c) car rolling down hill (d) could be either
Explanation:
Kinetic energy (KE) is given by
Where
So looking at each question:
a) both objects have the same speed (so
b) objects have the same mass (so
c) if the car is at rest,
d) The last question is ambiguous as it doesn't tell us about the speeds. At the same speed, the heavier bike (more mass) will have higher kinetic energy. However, the smaller bike could potentially have more kinetic energy if it is travelling at faster speeds