At what point in its motion is the KE of a pendulum bob at a maximum?
The KE of a pendulum is maximum at the bottom of its swing where its PE is minimum (or where we often take its PE to be zero). The PE of a pendulum is maximum at the top of its swing where it momentarily stops and its KE is zero.
How far will the car skid with locked brakes at 150 km h?
How far will the car skid with locked brakes if it is moving at 150 km/hr? The car skids 135 m. There is a three-fold increase in the speed of the car (150 / 50 = 3). Thus, there must be a nine-fold increase in the stopping distance.
Which has greater kinetic energy?
Also, kinetic energy is proportional to the square of velocity hence, lighter body has greater kinetic energy.
What is an object’s gravitational potential energy due to?
An object’s gravitational potential is due to its position relative to the surroundings within the Earth-object system. The force applied to the object is an external force, from outside the system. When it does positive work it increases the gravitational potential energy of the system.
What is pendulum class 12?
A simple pendulum is a mechanical arrangement that demonstrates periodic motion. The simple pendulum comprises a small bob of mass ‘m’ suspended by a thin string secured to a platform at its upper end of length L. The simple pendulum is a mechanical system that sways or moves in an oscillatory motion.
What is the formula for the maximum kinetic energy of a pendulum?
The kinetic energy would be KE= ½mv2,where m is the mass of the pendulum, and v is the speed of the pendulum. At its highest point (Point A) the pendulum is momentarily motionless.
When car moving at 40 km h is to be stopped by applying brakes?
Stopping distance s=u22a A car moving with a speed of 40km/hr can be stopped by applying breaks for 2 km.
Can an automobile Travelling with a speed of 60 km h brake to stop?
An automobile travelling with speed of 60Km /hr, can brake to stop within a distance of 20m. If the car is going as fast,i.e.120 Km/hr, the stopping distance will be: A) 20m.
What is the safe brake distance?
Braking distance goes up exponentially with speed. Also, allowing at least 3 seconds following distance between yourself and the vehicle in front of you will give enough distance to stop suddenly. Braking safely: Well-maintained brakes will take less time in bringing the vehicle to a stop.
Why light is called form of energy?
Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes. Light is defined as a form of electromagnetic radiation emitted by hot objects like lasers, bulbs, and the sun. Light contains photons which are minute packets of energy.
Can a body have momentum without energy?
A body cannot have energy without having momentum but it can have momentum without having energy.
Which body has greater momentum?
i.e. heavier body will possess greater momentum.
Where is the kinetic energy of the bob maximum at?
The bob of a simple pendulum at its extreme position. Q. Kinetic energy of the bob of a simple pendulum is maximum at the extreme left position.
At what position the kinetic energy of a simple pendulum is maximum?
Here, The answer is the kinetic energy of the pendulum is maximum at the equilibrium position because at the position the velocity is high. Note: The period of the pendulum does not get affected by mass. There is a direct relationship between the angle and velocity, so the mass does not affect the period of a pendulum.
What is the maximum kinetic energy of the bob?
The KE of a pendulum bob is at a maximum when the pendulum bob swings through the middle of the arc. A pendulum is a good example of energy conversions. When the pendulum is at the highest point, it temporarily pauses and all of its kinetic energy is converted into potential energy.
At what position the kinetic energy of an oscillating simple pendulum is maximum?
When released, it oscillates and loses the potential energy while at the mean position thereby having maximum kinetic energy at the mean position.