Square root A 1400 kg car is coasting on a horizontal road with a speed of 18 m/s . After passing over an unpaved, sandy stretch 35.0 m long, car's speed has decreased to 14 m/s calculate net force

The net force acting on the car is equal to 700 Newton.

Given the following data:

To calculate the net force acting on the car, we would apply the work-energy theorem:

According to the work-energy theorem, the amount of work done by the car must balance the kinetic energy possessed by the car due to its motion.

From the work-energy theorem, we have:

Now, we can calculate the net force:

Net force = 700 Newton.

Read more on work-energy theorem here: link

The net force on the car is 2560 N.

Explanation:

According to work energy theorem, the amount of work done is equal to the change of kinetic energy by an object. If '' be the work done on an object to change its kinetic energy from an initial value '' to the final value '', then mathematically,

where '' is the mass of the object and '' and '' be the initial and final velocity of the object respectively. If '' be the net force applied on the car, as per given problem, and '' is the displacement occurs then we can write,

Given, .

Equating equations (I) and (II),

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )