In which situation is a person doing work on an object?
Answer : When a person applies force and covers distance then the person is doing work on an object.
What type of force causes a change in motion?
Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the same direction on an object, the net force is equal to the sum of the two forces.
Is inertia The cause why objects maintain their state of motion?
All objects resist changes in their state of motion. All objects have this tendency – they have inertia. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.
What causes a moving body to resist change in state of motion?
Inertia: tendency of an object to resist changes in its velocity. An object at rest has zero velocity – and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.
What is the only factor that is constant for bodies falling in a vacuum?
An object that falls through a vacuum is subjected to only one external force, the gravitational force, expressed as the weight of the object. An object that is moving only because of the action of gravity is said to be free falling and its motion is described by Newton’s second law of motion.
How do you determine the state of motion of a body?
The state of motion of an object is defined by its velocity – the speed with a direction. Thus, inertia could be redefined as follows: Inertia: tendency of an object to resist changes in its velocity. An object at rest has zero velocity – and (in the absence of an unbalanced force) will remain with a zero velocity.
What is state of motion position of rest or position of motion?
Explanation: The state of motion of an object is described by its speed and the direction of motion. The state of rest is considered to be the state of zero speed. An object may be at rest or in motion; both are its states of motion.
What do you mean by change in the state of motion?
A change in the state of motion corresponds to either a change in the speed of the body and/ or a change in the direction of motion of the body. The change in speed could mean speeding up (acceleration) or speeding down (deceleration).
What is the difference between state of rest and state of motion of a body?
In physics, rest and motion are two different states of a body. A body is said to be at rest if its position does not change with respect to its surroundings. Whereas, when the position of a body changes with respect to its surroundings, it is said to be in motion.
Is your house at rest or in motion?
As the house is not moving , it is at rest. it is at motion as the earth keeps on moving and when we sleep we travel for about 0.5 kilometre!! Our house is at rest as it is not moving neither in straight nor in curved path.
What is state of motion with example?
A change in either the speed of a moving body or its direction or both is referred to as a change in its state of motion. Thus, the force can change the direction of motion. For example- In a cricket match, a bowler bowls the ball towards the batsman with some velocity(u).
What is meant by state of rest and state of motion?
The objects which do not change their positions with time are said to be at rest. The objects which change their positions with time are said to be in motion.
What is meant by rest state of body?
When the position of a body concerning its surroundings does not change with time, it is said to be “at rest”. State of motion: The state of motion of an object is defined by the speed with direction relative to a particular frame of reference or another object.
What are two examples of objects at rest?
The examples of rest include= sleeping , sitting , standing , staring , lying , a fixed clock , bottle kept on a table , a stopped car.