Question

5. Wiley E. Coyote (25 kg) is moving 10 m/s when his rocket skates engage, pushing him with
a force of 150 N in the direction of movement. How fast is he moving after 4 seconds?

Answer 1

The final velocity is 34 m/s

Explanation:

First of all, we can start by calculating the acceleration of the Coyote. This can be done by using Newton's second law:

$a=\frac{F}{m}$

where:

F = 150 N is the force applied on the Coyote

m = 25 kg is its mass

Substituting, we find the acceleration

$a=\frac{150}{25}=6.0 m/s^2$

Now we can find the final velocity by using the suvat equation:

v = u + at

where:

u = 10 m/s is the initial velocity

$a=6.0 m/s^2$ is the acceleration

And therefore, the velocity at a time of

t = 4 s

is

$v=10+(6.0)(4)=34 m/s$

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