Flash Education

Flash-Education-Logo-Transparent-with-border-25

Question

The diagram below shows a pendulum which was released from position A. (a) What form(s) of energy did the pendulum have at (i) A? (ii) B? (iii) C? (b) Eventually the pendulum would stop moving. Explain what has happened to the initial energy of the pendulum.

WhatsApp

Answer

(a) (i) Potential energy

(ii) Potential energy + Kinetic energy

(iii) Kinetic energy

(b) The initial energy is transformed into heat energy when the pendulum bob strikes the air molecules. Thus, the amplitude of pendulum decreases and finally it stops.

💡 Some Related Questions

Flash Education Question and Answer Icon

Shyam and his friends were playing with a catapult (gulel) in his garden. Several mangoes were dislodged and fell with the help of catapult. One of his friend was aiming the catapult on a bird. Shyam prevented him from doing so. (𝒊) Name the energy possessed by the stretched string of the catapult. (𝒊𝒊) What will happen if the stone is thrown without stretching the string of a catapult? (𝒊𝒊𝒊) Why did Shyam prevent his friend from aiming at the bird? Which quality is highlighted in Shyam’s behavior?

Open Answer »
Flash Education Question and Answer Icon

On a railway station, a passenger hires a coolie to pick his luggage and carry it to the train. When the coolie finished his work, he asked for the money. But the passenger refused to pay him saying that he has done no work. Answer the following questions based on the above information: (𝒊) Was the passenger right in saying so? (𝒊𝒊) What values are not promoted by the passenger? (𝒊𝒊𝒊) Give a situation seen in everyday life when no work is said to be done by you even though you get tired.

Open Answer »
Flash Education Question and Answer Icon

Figure shows a conveyor belt transporting a package to a raised platform. The belt is driven by a motor. (𝒊) State three types of energy, other than gravitational potential energy, into which the electrical energy supplied to the motor is converted. (𝒊𝒊) The mass of the package is 36 kg. Calculate the increase in the gravitational potential energy (P.E.) of the package when it is raised through a vertical height of 2.4 m. (𝒊𝒊𝒊) The package is raised through the vertical height of 2.4 m in 4.4 s. Calculate the power needed to raise the package. (𝒊𝒗) Assume that the power available to raise package is constant. A package of mass greater than 36 kg is raised through the same height. Suggest and explain the effect of this increase in mass on the operation of the belt.

Open Answer »
Close Menu