Aforce of 1 n will cause a mass of 1 kg to have an acceleration of 1 m/s2. therefore, a force of 7 n applied to a mass of 7 kg will cause it to accelerate at what rate?

1 m/s2

0.14 m/s2

8 m/s2

49 m/s2

7 m/s2

The correct choice is 1 m/s2

According to the unitary method if a force of 1 N will cause a mass of 1 kg to have an acceleration of 1 m/s2.

Then obviously  force of 7 N applied to a mass of 7 kg will also cause the acceleration of the same rate which will be 7m/s^2

Or

we can use the Newtons law

F = m a

7 = 7 * 1

= 1