Answer:
b. Medicine balls
Explanation:
A medicine ball (also called an exercise ball, or a health ball) is a weighted ball about the shoulder diameter (approx. 13.7 inches), often used for recovery and strength training.... In 1705 similar large balls had been used in Persia.So you can use your medicine ball as a projectile to boost the strength of your throws.
Temperature and energy ➡️ <em>Surface</em><em> </em><em>temperature</em><em> </em><em>and</em><em> </em><em>ocean</em><em> </em><em>temperature</em><em> </em>
Atmospheric composition ➡️ <em>Carbon-dioxide</em><em> </em><em>and</em><em> </em><em>other</em><em> </em><em>greenhouse</em><em> </em><em>gases</em>
Ocean and water ➡️ <em>Ocean</em><em> </em><em>acidification</em><em> </em><em>and</em><em> </em><em>sea</em><em> </em><em>level</em>
Cryosphere<em> </em>➡️ <em>Sea</em><em> </em><em>ice</em><em> </em><em>and</em><em> </em><em>galciers</em>
Answer:
Twice
Explanation:
From the formula for velocity in a circle
V= 2πr/T
Where V is velocity
r is raduis
T is period
We see that as r increases V increases so if r is doubled V becomes doubled
Answer:
Part a)
Work done is given as
W = -121.5 J
Part b)
Potential energy of the system is given as
Explanation:
As we know that work done by variable force is given as
here we know that
so we have
so we have
here we displace it from x = 2 to x = 5
so we will have
Part b)
As we know that change in Potential energy = work done