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Questions  

The height y and the distance x along the horizontal plane of a projectile on a certain planet (with no surrounding atmosphere) are given by y = (8t - 5t2) meter and x = 6t meter, where r is in seconds. The velocity of projection is:

a
8 m/s
b
6 m/s
c
10 m/s
d
not obtained from the data

detailed solution

Correct option is C

y = 8t - 5t2vy=dydt=8-10tx = 6tvx=dydt=6Velocity at any time ‘t’ v=vx2+vy2=62+8-10t2Velocity of projection (i.e., velocity at t = 0)= 62+82=10m/s

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Similar Questions

Assertion : When the velocity of projection of a body is made n times, its time of flight becomes n times.

Reason : Range of projectile does not depend on the initial velocity of a body.


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