Question

A small economy car (low mass) and a limousine (high mass) are pushed from rest across a parking lot, equal distances with equal forces. The car that receives more kinetic energy is the ________.a. the limousine

b. the small economy car
c. neither one - they receive the same amount of kinetic energy

Answer 1

The limousine receives more kinetic energy.

Step-by-step explanation:

The car that receives more kinetic energy is the limousine.

The kinetic energy of an object depends on its mass and velocity. When two objects are pushed with equal force and travel equal distances, the one with greater mass will have a lower velocity. Since kinetic energy is directly proportional to mass and velocity, the limousine, being a high mass vehicle, will have more kinetic energy than the small economy car.

For example, if both vehicles are pushed with the same force for the same distance, the limousine, being heavier, will have a lower velocity compared to the small economy car. However, due to its greater mass, the limousine will have more kinetic energy.

Answer 2

The car that receives more kinetic energy is the small economy car.

Step-by-step explanation:

K.E = 0.5*mv²

Where;

K.E is the kinetic Energy

M is the mass of an object

V is the velocity of the moving object

But F = m(v/t), from Newton's second law of motion

If equal forces were applied to the two cars, then the velocity of each car will be calculated as follows.

v = (Ft/m)

v² = (Ft/m)²

Substitute in the value of v² into Kinetic energy equation

K.E = 0.5*mv²

K.E = 0.5*m(Ft/m)² = (0.5*F²t²)/m

Also assuming equal distance, equal force and assuming equal time for both cars.

The above equation will reduce to, K.E = k/m

Where k = 0.5*F²t², which is equal in both cars.

Thus, Kinetic energy will depend only on the mass of each car.

From the above expression, Kinetic Energy received by each car is inversely proportional to the mass of the car.

A small economy car (low mass) will receive more kinetic energy while a limousine (high mass) car will receive less kinetic energy.

Therefore, the car that receives more kinetic energy is the small economy car.