Question

A stone projected from level ground at t=0 sec such that horizontal and vertical components of initial velocity are 10ms and 20ms respectively.then the instant of time at which magnitude of tangential and magnitude of normal components of acceleration

Answer 1

making the components equal
we get ,
velocity of x component. =. velocity of y component
remaining explanation is in pic given below

Answer 2

Answer: 1sec and 3 sec

Explanation:Make component of Y and X acid of velocity equal. That is

Vy=Vx

Uy+AyT=Vx (since Vx always remains

constant but Vy changes)

Taking sign convention :

1) +ve for upwards and -ve for downwards,

20-10t=10

t=1sec

2) -ve for upwards and +ve for downwards,

-20+10t=10

t=3sec.

Press THANKS button if it helped you.