Question

What is the velocity of the eraser

Answer 1

Answer:

-63.6m/s

Explanation:

Given parameters:

Initial velocity = 5m/s

Time of flight = 7s

Unknown:

Velocity of the eraser after 7s = ?

Solution:

To solve this problem, we have to use the right motion equation which is given below;

v = u - gt

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity = 9.8m/s²

t is the time taken;

Now insert the parameters and solve for v;

v = 5 - (9.8 x 7)

v = -63.6m/s