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A car starts from the rest and accelerates at the rate of 5m/s2. It continue accelerating for 10 s and then move at constant velocity for next 10 s. Calculate the total distance traveled by the car in 20s. (5)
Asked by siddsag2972 | 11 May, 2020, 12:48: PM
a = 5 m/s2
u =0
v =?

Distance covered by car when it was still accelerating in for 10 s is given by 2nd equation of motion,

s = ut + 1/2 at2

Now, it attains a constant speed. This constant speed can be calculated using first equation of motion,

v = u + at
v = 0 + (5) x (10)
v = 50 m/s

Now, let's calculate the distance travelled in next 10 s.
As the velocity attains the constant velocity, the acceleration will become zero.

Hence,

Thus, the total distance covered in these 20 s = s1 + s2 = 250 + 500 = 750 m

Answered by Shiwani Sawant | 11 May, 2020, 04:10: PM

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