a car is travelling on a straight level track with a uniform speed of 25 m per second when the car is moving away from a gun at the same level at a distance of 1500 m the gun is fired at an angle of 45 degree find the distance of car from the gun when it is hit(in km)
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Answer:
a car is travelling on a straight level track with a uniform speed of 25 m per second when the car is moving away from a gun at the same level at a distance of 1500 m the gun is fired at an angle of 45 degree .
Explanation:
speed= 25 m/s
The distance moved by the car in time t= 25*t
The distance from where gun is fired at time t=ucos45×t.
the time when gun hits the car, the distance change is given by
1500+25t =u×1/√2×t.−−−(1)
t=2usin45/g=2u/g√2−−−(2)
from equation (1) and(2), we get,
1500+25 x 2u/g√2 = u×1/√2 x2u/g√2
from this we need to solve the value of u and that will be our answer.
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