Question

select the correct answer. sally is riding a snowmobile on a flat, snow - covered surface with a constant velocity of 10 meters/second. the total mass of the snowmobile, including sally, is 280 kilograms. if sally accelerates to a velocity of 18 meters/second over 10 seconds, whats the force exerted by the snowmobile to accelerate? use f = ma, where a = \\(\frac{v - u}{t}\\). a. 160 n b. 168 n c. 248 n d. 280 n e. 324 n

Explanation:

Step1: Calculate the acceleration

The formula for acceleration $a=\frac{v - u}{t}$, where the initial velocity $u = 10$ m/s, the final velocity $v=18$ m/s and the time $t = 10$ s. So $a=\frac{18 - 10}{10}=\frac{8}{10}=0.8$ m/s².

Step2: Calculate the force

We know that $F=ma$, and the mass $m = 200$ kg, $a = 0.8$ m/s². Then $F=200\times0.8 = 160$ N.

Answer:

A. 160 N