assesment for grade 8

1. A cat with weight of 400 N can climb a tree

      with height of 5m in 20 seconds. Calculate

      the power of the cat!

2.  A mango with mass of  0.5 kg falls down

      from height of  8 m to the ground. If g = 10

     m/s² calculate :

      a. potential energy of mango before falls

          down

      b. kinetic energy when touch the ground.