Question

If force = mass x acceleration, What is the force applied to a 20 kg rock that is acceleration at a 20 m/s^2?

A.)20 N
B.)0 N
C.)40 N
D.)10 N

Answer 1

Answer: The correct answer is 400 N.

Step-by-step explanation:

The expression for the force in terms of mass and acceleration by using Newton's second law is as follows;

F=ma

Here, m is the mass of the object and a is the acceleration.

It is the given in the problem that the mass of the rock is 20 kg and the acceleration is 20 meter per second square.

Calculate the applied force.

Put m= 20 kg and a= 20 meter per second square in the above expression.

F= (20)(20)

F= 400 N

Therefore, the applied force is 400 N.

Answer 2

Answer: 400 N

Step-by-step explanation:

Newton's second law states that the force applied to an object is directly proportional to the acceleration of the object, following the relationship

`F=ma`

where

F is the force applied

m is the mass of the object

a is the acceleration

In this problem, we have

m=20 kg is the mass of the rock

`a=20 m/s^2` is its acceleration

Therefore, the force applied on the rock is

`F=ma=(20 kg)(20 m/s^2)=400 N`