Question

1. A kangaroo hops 84 m to the east in 7 seconds.

Answer 1

Explanation:

Given parameters:

Distance hopped  = 84m

Displacement  = 84m due east

Time  = 7s

Unknown:

Speed of kangaroo  = ?

Velocity of kangaroo  = ?

Solution:

To solve this problem,

    Speed  = $\frac{distance}{time }$   = $\frac{84}{7}$  = 12m/s

  Velocity  = $\frac{displacement}{time}$   = $\frac{84}{7}$   = 12m/s due east