A car starting from rest is uniformly accelerated at the rate of 2 m/second square for 5 seconds. It then maintains a constant speed for one minute. The brakes are then applied and the car is brought to rest in 5 seconds. Find the total distance covered by the car.

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Solution

From data given in the problem

Initial velocity of the object u=0,

Acceleration of the object $a = m / s^{2}$
Displacement of the body in 8th second =?
Let us substitute n=8 in the formula $= u + a (\frac{n - 1}{2})$
$= 0 + 4 (8 - \frac{1}{2}) = 4 (7.5) = 30 m$

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A car starting from rest is uniformly accelerated at the rate of 2 m/second square for 5 seconds. It then maintains a constant speed for one minute. The brakes are then applied and the car is brought to rest in 5 seconds. Find the total distance covered by the car.

From data given in the problem Initial velocity of the object u=0, Acceleration of the object a=m/s2 Displacement of the body in 8th second =? Let us substitute n=8 in the formula =u+a(n−12) =0+4(8−12)=4(7.5)=30 m

From data given in the problem

Initial velocity of the object u=0,

Acceleration of the object $a = m / s^{2}$
Displacement of the body in 8th second =?
Let us substitute n=8 in the formula $= u + a (\frac{n - 1}{2})$
$= 0 + 4 (8 - \frac{1}{2}) = 4 (7.5) = 30 m$