Question

jake pushes a football sled to the left during practice. the sled weighs 1,000 newtons. as the sled moves, jake pushes it with a force of 700 newtons to the left. the force of friction between the sled and the ground is 600 newtons.
describe the football sleds motion.
the football sled is ____ while experiencing a net force __. so, the magnitude of the football sleds velocity is ____.

Explanation:

Step1: Define force directions

Let left be the positive direction. Jake's push $F_{push}=700\ \text{N}$, friction $F_{friction}=-600\ \text{N}$ (opposes motion, right direction).

Step2: Calculate net force

Net force is sum of forces.
$$F_{net}=F_{push}+F_{friction}=700 + (-600)=100\ \text{N}$$

Step3: Relate net force to motion

A positive net force (leftward) means acceleration is leftward, in the direction of motion.

Answer:

The football sled is accelerating to the left while experiencing a net force of 100 newtons to the left. So, the magnitude of the football sled's velocity is increasing.