Table of Contents
- 1 Is work done by Earth Positive or negative?
- 2 How do you know if work done is positive or negative?
- 3 Is work done on an object negative?
- 4 What is negative work done?
- 5 When object is thrown upward the force of gravity is?
- 6 What happens when an object is thrown up?
- 7 What is the initial velocity and acceleration of a falling stone?
- 8 What is the difference between positive and negative force of gravity?
Is work done by Earth Positive or negative?
Work done by gravity can be negative or positive depending on weather the body is being raised from earth or brought down towards earth. W = F X d X Cos (180) = -FXd which is negative work. Like-wise it will be positive when the mass comes down or accelerates towards the earth.
How do you know if work done is positive or negative?
Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work.
When a stone is thrown up the work done by the force of gravity is?
The work done by the force of gravity is 6.12 Joules.
When an object is thrown upward the force of gravity is negative or positive?
Gravity acts downward. Complete answer: When the body is thrown upwards, it moves up until the velocity of the ball becomes zero and the force exerted on it becomes zero.
Is work done on an object negative?
Work is a measurement of energy, so it may seem odd to think that a work can be negative — but it can! Work is how much energy is done by a force over a distance. If you try to stop the net from moving, you will apply a force in the opposite direction that the net is moving. …
What is negative work done?
NEGATIVE WORK: The work done is said to be negative work when force and displacement are in opposite direction. Example: When an object is thrown upwards,the force of gravity is in downward direction whereas displacement acts in upward direction.
When an object is thrown up work done by the gravity of the earth on the body is?
Since the angle between the force and displacement is 180 degrees, the work done by the gravitational force on the body is negative.
What is work done by a force of gravity in the following cases a stone of mass 250 g is thrown up through a height of 2.5 m?
A stone of mass 250 g is thrown up through a height of 2.5 m. . If an object is moving in a circular path, On a complete revolution the displacement is zero. Therefore, the work done is zero.
When object is thrown upward the force of gravity is?
Textbook solution Force of gravity always acts towards the centre of the Earth. When an object is thrown vertically upwards, the force of gravity acts in the opposite direction of motion, i.e., towards the centre of the Earth. in the same direction as the direction of motion.
What happens when an object is thrown up?
Once the body is thrown upwards, it goes up until the velocity of the ball turns out to be zero and the force exerted on it becomes zero. After that, the ball touches the ground with acceleration due to gravity and zero velocity. The acceleration that acts on the body is because of the gravitational force.
What happens when a stone is thrown vertically?
When a stone is thrown upwards vertically, the force of gravity is acting on it and it decelerates the stone. It does not accelerate the stone going upwards. The force of throwing accelerates the stone upwards. Force is a vector quantity.
Why is the force of gravity attractive when throwing a stone?
The force of gravity is attractive. When a stone is thrown upwards vertically, the force of gravity is acting on it and it decelerates the stone. It does not accelerate the stone going upwards. The force of throwing accelerates the stone upwards.
What is the initial velocity and acceleration of a falling stone?
After the stone reaches its peak and starts coming down, both velocity and acceleration are negative. If you choose down to be the positive direction, then the initial velocity is negative and the acceleration due to gravity is positive. After the stone reaches its peak and starts coming down, both velocity and acceleration are positive.
What is the difference between positive and negative force of gravity?
2) Positive = Force of gravity and displacement by falling are in same direction. 3) Zero = No displacement, therefore, no work. 4) Negative = Force and displacement in opposite direction. 5) Negative = Force and displacement in opposite direction. Was this answer helpful?