acceleration = change in velocity/change in time
so...
a = 20 m/s / 2 seconds
a = 10
hope that helps :)
P.S. found this from Brainly User, sometimes all you have to do is search to find the answer.
Answer:
The definition of acceleration is: Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.
Explanation:
Answer:
I believe the answer is B.)
It would be: Activation Energy = 300 KJ
Hope this helps!
Answer:
Explanation:
The stored elastic energy in the spring helps the box to rise to a height of .75 m
So stored elastic energy = potential energy attained
1/2 k d² = mgh , k is spring constant , d is compression in spring , m is mass of box , h is height attained .
Putting the values
.5 x 220 x d² = 4 x 9.8 x .75
d² = .2673
d = .517 m
51.7 cm .
