Question

(GIVE THE ANSWER OR GET REPORTED) Please solve it with the steps​

Answer 1

4. a = 2 m/s² 5. m = 20 kg

Step-by-step explanation:

4.

Mass of the book, m = 2kg

The net force acting on the book, F = 4 N

Let a is the acceleration of the book. We know that,

F = ma

Put all the values,

`a=(F)/(m)\\\\a=(4)/(2)\\\\a=2\ m/s^2`

So, the acceleration of the book is equal to
`2\ m/s^2`.

5.

Kinetic energy of the car, K = 4000 J

Speed of the car, v = 20 m/s

We need to find the mass of the car. The formula for the kinetic enregy is given by :

`K=(1)/(2)mv^2\\\\m=(2K)/(v^2)\\\\m=(2* 4000)/((20)^2)\\\\m=20\ kg`

So, the mass of the car is equal to 20 kg.