JAMB  >  Quick Revision: Laws of Motion

# Quick Revision: Laws of Motion - Physics for JAMB

## Physics for JAMB

262 videos|249 docs|232 tests

## FAQs on Quick Revision: Laws of Motion - Physics for JAMB

 1. What are Newton's laws of motion?
Ans. Newton's laws of motion are three fundamental principles that describe the relationship between the motion of an object and the forces acting upon it. The laws state that an object at rest will remain at rest, and an object in motion will continue moving at a constant velocity unless acted upon by an external force (first law); the rate of change of momentum of an object is directly proportional to the net force applied to it, and it occurs in the direction in which the force is applied (second law); and for every action, there is an equal and opposite reaction (third law).
 2. How does Newton's first law of motion apply to everyday life?
Ans. Newton's first law of motion, also known as the law of inertia, applies to everyday life in various situations. For example, when you are driving a car and suddenly apply the brakes, your body tends to move forward due to its inertia. Similarly, when a bus starts moving suddenly, the passengers standing inside the bus tend to move backward due to their inertia. These examples demonstrate how an object tends to resist changes in its state of motion, as described by Newton's first law.
 3. Can you explain the concept of momentum in relation to Newton's second law of motion?
Ans. Momentum is a property of a moving object that depends on its mass and velocity. Newton's second law of motion states that the rate of change of momentum of an object is directly proportional to the net force applied to it. This means that for a given force, an object with a larger mass will experience a smaller change in velocity compared to an object with a smaller mass. Therefore, the concept of momentum helps us understand how the motion of an object changes in response to applied forces, as described by Newton's second law.
 4. How do Newton's laws of motion explain the motion of objects in a gravitational field?
Ans. Newton's laws of motion explain the motion of objects in a gravitational field, such as the motion of a falling object. According to Newton's second law, the force of gravity acting on an object is directly proportional to its mass. This force, known as weight, causes the object to accelerate downwards. Additionally, Newton's third law states that for every action (force) there is an equal and opposite reaction. In the case of a falling object, the object exerts an equal and opposite force on the Earth, but due to the Earth's larger mass, the effect of this force is negligible.
 5. How do Newton's laws of motion apply to sports?
Ans. Newton's laws of motion are applicable to various aspects of sports. For example, when a baseball player hits a ball, the force applied to the ball causes it to accelerate in the direction of the hit, as described by Newton's second law. Additionally, the third law explains why a swimmer can propel themselves forward by pushing against the water with their arms and legs. The water exerts an equal and opposite reaction force, propelling the swimmer forward. Overall, Newton's laws of motion help in understanding the mechanics and dynamics involved in various sports activities.

## Physics for JAMB

262 videos|249 docs|232 tests

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