Laws of Motion - SS1 Physics Past Questions and Answers - page 2
Which of the following statements is true about mass?
Mass is a measure of the gravitational force acting on an object.
Mass is a measure of the amount of matter in an object.
Mass determines the speed of an object.
Mass depends on the size and shape of an object.
According to Newton's second law of motion, the acceleration of an object is directly proportional to:
The net force applied to the object.
The displacement of the object.
The velocity of the object.
The weight of the object.
Which of the following statements is true about mass and weight?
Mass and weight are the same thing and can be used interchangeably
Mass is a scalar quantity, while weight is a vector quantity.
Mass is measured in kilograms, while weight is measured in newtons.
Mass depends on the gravitational field, while weight does not.
Explain the concept of inertia and its relationship to Newton's first law of motion.
Inertia is the property of an object to resist changes in its state of motion. It is related to Newton's first law of motion, also known as the law of inertia. According to this law, an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force.
Differentiate between mass and weight and explain their significance in the study of physics.
Mass and weight are two distinct concepts in physics, Mass is a measure of the amount of matter present in an object. It is a scalar quantity and is measured in kilograms (kg). Mass remains constant regardless of the location of the object or the presence of a gravitational field. In other words, an object's mass remains the same whether it is on Earth, on the Moon, or in space. Mass is an intrinsic property of an object and provides a measure of its inertia, as discussed in the previous essay question.
Weight, on the other hand, is the force exerted on an object due to gravity. It is a vector quantity and is measured in newtons (N). Weight depends on the mass of an object and the gravitational field strength at its location. The weight of an object can vary depending on the strength of the gravitational field. For example, an object that weighs 100 N on Earth would weigh only about 16.6 N on the Moon due to the Moon's weaker gravitational pull.
A block is sliding down a frictionless inclined plane. Which force is responsible for its acceleration?
Friction
Tension
Normal force
Gravitational force
A person is pushing a heavy box across a rough surface. Which force opposes the motion of the box?
Friction
Tension
Normal force
Gravitational force
A book is resting on a table. Which force prevents the book from falling through the table?
Friction
Tension
Normal force
Gravitational force
A rope is supporting a hanging weight. Which force is exerted by the rope to hold the weight?
Friction
Tension
Normal force
Gravitational force
A car is moving in a circular path. Which force keeps the car on its curved trajectory?
Friction
Tension
Normal force
Centripetal force