Question

A car is moving with a constant velocity of 50 km/h and the mass of car is 1000 kg, the net force acting on it is
Choose one:

Zero

50 N

20 N

18 N

Answer 1

As it is moving at constant velocity (maybe the speed of the light)the force acting on it is zero newton

Answer 2

Answer:

The correct option is (a) Zero.

Concept:

What is net force?

The total of all forces exerted on an object is known as the net force. A mass can accelerate due to net force. A body is subject to another force whether it is at rest or in motion. When there are a lot of forces acting on a system, the term "net force" is employed.'

What is constant velocity?

A moving object's position, velocity, and acceleration are all known. A physical term called an object's velocity tells us how quickly and in which direction the object is shifting positions.

Given:

Velocity of car, V = $50\frac{km}{h}$

Mass of car, m = 1000 kg

Find:

Net force of the car.

Solution:

According to question the car is moving with constant velocity.

$F_{net} = m\frac{dv}{dt}$

$a = \frac{dv}{dt}$

Here, acceleration is zero because the object is travelling at a constant speed, the body will experience no acceleration. Therefore, the item will experience no net force.

a = 0

$F_{net} = 0$

Hence, net force of the car is zero.

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Answer 3

Answer:

The net force acting on the car is zero.

Explanation:

We will use the following formula to solve this question.

$\mathrm{F=ma }$               (1)

Where,

F=force acting on the car

m=mass of the car

a=acceleration with which the car is moving

From the question we have,

The velocity with which the car is moving=50 km/hr

The mass of the car=1000 kg

And for acceleration, we know that it is the rate of change of velocity. So, if velocity is constant then so the acceleration will be zero and vice-versa.

When we enter "a=0" in equation (1), we obtain;

$\mathrm{F=1000\times 0 }$

$\mathrm{F=0\ N }$

The net force on the automobile is therefore zero.

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