Question

a bicycle moves forward with 200 n of force. the force of friction opposing the forward motion is 20 n. which of the following are true of the net - force and speed? select two correct answers.

Explanation:

Step1: Calculate net - force

The forward force $F = 200\ N$ and the frictional force $f=20\ N$ acting in the opposite direction. The net force $F_{net}$ is given by the formula $F_{net}=F - f$.
$F_{net}=200 - 20=180\ N$

Step2: Analyze the effect on speed

According to Newton's second law $F = ma$ (where $F$ is the net - force, $m$ is the mass and $a$ is the acceleration). Since there is a non - zero net force ($F_{net}=180\ N$), there will be a non - zero acceleration. If there is a non - zero acceleration in the direction of motion, the speed is increasing.

Answer:

The net force is 180 N, The speed is increasing.