A footballer kicks the football to check his stamina with velocity 60√2m/s at an angle of 45°find the velocity of football after 3s
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in horizontal direction.
there is no accelwration in this direction so the vel. in this direction(Vx) remains constant.
while in vertical direction there is retardationVx due to gravity=-g
at t=0
Vx=ucos(theta)=60m/s
Vy=usin(theta)=60m/s
at t=3 sec
Vx=60m/s
Vy=60-10*3. since v=u+at
a=-g
Vy=30m/s
V=root of(Vx^2+Vy^2)
V=.... ......(60^2+30^2)
30*root of(5)
there is no accelwration in this direction so the vel. in this direction(Vx) remains constant.
while in vertical direction there is retardationVx due to gravity=-g
at t=0
Vx=ucos(theta)=60m/s
Vy=usin(theta)=60m/s
at t=3 sec
Vx=60m/s
Vy=60-10*3. since v=u+at
a=-g
Vy=30m/s
V=root of(Vx^2+Vy^2)
V=.... ......(60^2+30^2)
30*root of(5)
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