Concepts Of Physics MCQ Edition [Volume 1]
- Exam
- Concepts Of Physics MCQ Edition [Volume 1]
- Subject
- Physics
- Chapter
- Newton's Laws of Motion
Concepts Of Physics MCQ Edition [Volume 1] · Physics · Newton's Laws of Motion
When a car accelerates along a horizontal road, the force...
When a car accelerates along a horizontal road, the force responsible for the acceleration is exerted by
Options
- Athe car's engine
- Bthe car's driver
- Cthe earth
- Dthe road
Correct answer
D. the road
Step-by-step solution
When a car accelerates, the engine provides torque to the wheels, causing them to rotate.
As the wheels rotate, they push backward against the road due to friction.
According to Newton's third law of motion, the road exerts an equal and opposite forward frictional force on the tires.
Since internal forces cannot accelerate the center of mass of the system, this external frictional force exerted by the road is responsible for the acceleration of the car.
As the wheels rotate, they push backward against the road due to friction.
According to Newton's third law of motion, the road exerts an equal and opposite forward frictional force on the tires.
Since internal forces cannot accelerate the center of mass of the system, this external frictional force exerted by the road is responsible for the acceleration of the car.