Answer:
a.
b.
Explanation:
We are given that




a.We have to find the angle


b. We have to find the speed 
According to law of conservation of momentum



Answer:
<h2>50 N</h2>
Explanation:
The force required can be found by using the formula

w is the workdone
d is the distance
From the question we have

We have the final answer as
<h3>50 N</h3>
Hope this helps you
True: All matter on earth is made up of atoms.
False: Subatomic particles don't identify an element. I give you an electron. Can you tell me where it came from?
False: (1/2) A neutron has no charge [That's the True part]. It identifies the element. (Not true).
True: description of an electron.
True: description of a proton