Question

compute the square of
$20 \: \frac{1}{4}$
using an identity.

•what is
$20 \: {\frac{1}{4}}^{2}$
​

Answer 1

Step-by-step explanation:

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Answer

Distance covered by car is 32 metres.

Force acting on it is 12 newton.

Explanation:

According to the Question

It is given that

Initial velocity ,u = 0m/s

Final velocity ,v = 16m/s

Time taken ,t = 4s

Mass of cart ,m = 3kg

we need to calculate the force acting on it and distance covered by it .

Firstly we calculate the acceleration of the car .

Using Kinematics Equation

v = u + at

Putting all the value we get

➺ 16 = 0 + a×4

➺ 16 = 4×a

➺ a = 16/4

➺ a = 4m/s²

So, the acceleration of the car is 4m/s².

As we know that Force is calculated by the product of mass and acceleration .

F = ma

substitute the value we get

➺ F = 3×4

➺ F = 12N

Hence, the force acting is 12 newton.

Now, calculating the distance covered by car in given condition.

again using Kinematics Equation

v² = u² + 2as

substitute the value we get

➺ 16² = 0² + 2×4 ×s

➺ 256 = 0 + 8 × s

➺ 256 = 8×s

➺ s = 256/8

➺ s = 32m

Hence, the distance covered by the car is 32 metres.