Question

A cannonball is shot from the top of a
47.8 m high hill at a speed of 53.7 m/s.
How fast is it going when it reaches
the plain below?

Answer 1

Answer:

61.8

Explanation:

Answer 2

It must be going at a speed of 61.81 m/s when it reaches the plain below

What are  kinematic equations?

The kinematic equations are a set of equations that describe the motion of an object with constant acceleration. Kinematics equations require knowledge of derivatives, rate of change, and integrals.

using  Kinematics equations

$v^{2}$ = $u^{2}$ + 2gs                         ( a = g)

   = $(53.7)^{2}$ + 2 * 9.8 * 47.8 m

 v  = 61.81 m/s

It must be going at a speed of 61.81 m/s when it reaches the plain below

learn more about Kinematics equations

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