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A body is projected with an initial spee...

A body is projected with an initial speed of `100sqrt(3) ms^(-1)` at an angle of 60° above the horizontal. If g = `10 ms^(-2)` then velocity of the projectile
a)is perpendicular to its acceleration at instant t = 15 sec.
b) Is perpendicular to initial velocity of projection at t = 20 sec.
c) Is minimum at the highest point
d) Changes both in magnitude and direction, during its flight.
Mark the answer as

A

if a, b, c and d are correct

B

if a, c and d are correct

C

if b, c and d are correct

D

if a, b and d are correct

Text Solution

Verified by Experts

The correct Answer is:
A
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