Answer:
(a) 
(b) 
Explanation:
(a) Since a constant external force is applied to the body, it is under an uniformly accelerated motion. Using the following kinematic equation, we calculate the final velocity of the mass if it is initially at rest(
):

According to Newton's second law:

Replacing (2) in (1):

(b) In this case we have
. So, we use the final velocity equation:

Three forces involved in brushing your teeth are first push, then pull, then push.
Answer:
30ms
Explanation:
you need to multiple the 10ms by 3s which gives you 30ms
When people aboard a plane...the amount of baggage you take has to vary because the plane has a certain carrying capacity.
Kinetic energy is calculated as such:
| therefore, 