Question

000
SY
The momentum of a body is
P=2 costi+2 sintj
What is the angle between the force Facting
on the particle and the momentum p?
4) 90° B) 45° C) 135° P) 120°​

Answer 1

Answer:

$\huge\boxed{\fcolorbox{cyan}{lightblue}{(a)90°.}}$

Answer 2

Answer: Force = dP/dt = -2sin(t) i^ + 2cos(t) j^

Dot product of momentum and force is

F.P = -4sin(t) cos(t) + 4cos(t)sin(t) = 0

As dot product is zero , angle between force and momentum is 90 °

Explanation: