Question

Click/tap theExploreUse the Interactive to explore the following questions:1. With Friction and Air Drag turned off, describe the effectthat an applied force has upon the velocity? Also, draw theforce diagram at the right. Label the forces using Fapp forApplied force, Fnorm for Normal force from the ground, andFgrav for the Weight of the sled.

Answer 1

The applied force is directly proportional to the change of momentum of an object wit the time. The momentum is related to the product of mass and velocity.

The applied force is directly proportional to the acceleration of an object. The expression for the applied force is written as follows:

`\begin{gathered} F_(app)=m(dp)/(dt) \\ F_(app)=m(v-u)/(t) \\ F_(app)=ma \end{gathered}`

The mass of an object is denoted as m, the acceleration of an object is denoted as a, the initial velocity is taken as u, the final velocity is taken as v, change in momentum is denoted as dp, and the time taken is denoted as t.

Thus, applied force is directly proportional to the rate of change of velocity.