Question

1. a 10 - kg block is pushed across a friction - free horizontal surface with a horizontal force of 20 n. the acceleration of the block is a) 1 m/s². b) 2 m/s². c) 5 m/s². d) 10 m/s². e) none of the above

Explanation:

Step1: Recall Newton's second - law

Newton's second - law is $F = ma$, where $F$ is the net force, $m$ is the mass, and $a$ is the acceleration.

Step2: Solve for acceleration

We are given $F = 20\ N$ and $m=10\ kg$. Rearranging the formula $F = ma$ for $a$, we get $a=\frac{F}{m}$.
Substitute $F = 20\ N$ and $m = 10\ kg$ into the formula: $a=\frac{20\ N}{10\ kg}=2\ m/s^{2}$.

Answer:

B. $2\ m/s^{2}$