Answer:

Step-by-step explanation:
The range of a projectile is given by :

Put R = 20 m, u = 15 m/s and finding the value of angle of projection
So,

So, the required angle of projection is equal to
.
Answer:
1st, 3rd and 4th options.
Step-by-step explanation:
Answer:
4.64c
Step-by-step explanation:
Answer:
14n
Step-by-step explanation:
You multiply 14 by n, which is 14n.
Answer:
16 is the answer
Step-by-step explanation: