A stone of mass 0.5 kg is moving with a speed of 8 m/s. Its kinetic energy is ________.
16 J
Kinetic energy = \(\frac{1}{2}\) mv2.
= \(\frac{1}{2}\) × 0.5 × 82 = 0.25 × 64 = 16 J.
Hence, the answer is 16 J.
Similar Questions
The work done in carrying a block of mass 30 kg to a height of ‘X’ m is 6000 J. What will be the value of X (in m)?
(Take the value of \(g = 10\ \text{m/s}^2\))
A stone of mass 500g is raised from ground to a height of 20 m. What is the gain in its potential energy?
(Take g=10 m/s2)
Which of the following statement(s) is /are true regarding the work done by a constant force acting on a body?
(i) The work done by the force can never be zero.
(ii) If the direction of the force and displacement of the body is same, the work done will be positive.
(iii) The S.I. unit of work done is joule.
Which of the following is an example of chemical energy?
A box is raised to the same height either by lifting it vertically or by pushing it up an ideal inclined plane. Which quantity is the same in both cases?
The work done to increase the kinetic energy of a 4 kg object from 50 J to 98 J is:
What form of energy does a glowing bulb emit?
According to the work-energy theorem, if the net work done on an object is zero, then its kinetic energy ________.
A car with a mass of 1000 kg is moving at a speed of 25 m/s. If the driver applies the brakes and brings the car to a stop, how much kinetic energy is lost during this process?
If a force of 1 N displaces an object by 1 m along the line of force, the work done is:
Important Questions from Work Power and Energy
Which of the following is an example of potential energy?
Energy in natural systems is transferred by _______.
Choose the best option from the following.
_______ is one of the chemical used to produce Ocean Thermal Energy.
A body of mass 2kg is thrown up vertically with a kinetic energy of 500J. If the acceleration due to gravity is 10 m/s2, the height at which the kinetic energy of the body becomes half of the original values is _____
Arjun has a mass of 50 kg, he eats banana of 1000 calories. If this energy is used up to lift him from the ground, the height to which he can climb is _______. Take g = 10 m/s2 and 1 calories = 4.2 Joule.
