Food is consumed by a person and enables him to move his hand to lift up a ball to a certain height- The ball is released and hits the floor causing a loud sound- Which of the following is the correct step-by-step energy conversion of the ball-a- Chemical potential energy rarr- gravitational potential energy rarr- kinetic energy-b- Chemical potential energy rarr- kinetic energy rarr- gravitational potential energy rarr- kinetic energy rarr- sound energy-c- Elastic energy rarr- kinetic energy rarr- gravitational potential energy rarr- sound energy-d- Kinetic energy rarr- gravitational potential energy rarr- kinetic energy - chemical energy rarr- sound energy

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Byju's Answer

Standard VII

Physics

Potential Energy of an Object at a Height

Food is consu...

Question

Food is consumed by a person and enables him to move his hand to lift up a ball to a certain height. The ball is released and hits the floor causing a loud sound. Which of the following is the correct step-by-step energy conversion of the ball?
(a) Chemical potential energy → gravitational potential energy → kinetic energy
(b) Chemical potential energy → kinetic energy → gravitational potential energy → kinetic energy → sound energy
(c) Elastic energy → kinetic energy → gravitational potential energy → sound energy
(d) Kinetic energy → gravitational potential energy → kinetic energy + chemical energy → sound energy

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Solution

$D e a r S t u d e n t, w h e n w e c o n s u m e f o o d w e g e t c h e m i c a l p o t e n t i a l e n e r g y f r o m t h e f o o d . W h i l e l i f t i n g t h e b a l l w e m o v e o u r h a n d s o w e u s e k i n e t i c e n e r g y . W h e n b a l l i s d r o p p e d f r o m t h e h e i g h t i t c o m e s u n d e r t h e a c t i o n o f g r a v i t y i . e, g r a v i t a t i o n a l p o t e n t i a l e n e r g y . A s i t i s m o v i n g u n d e r a n a c t i o n o f f o r c e s o i t g e t c o n v e r t e d i n t o k i n e t i c e n e r g y W h i c h w h e n c o l l i d e t o p r o d u c e s o u n d g e n e r a t e s s o u n d e n e r g y . h e n c e t h e r i g h t o p t i o n i s b R e g a r d s$

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Similar questions

Q. Which of the following energy change involves frictional force?

(a) chemical energy to heat energy
(b) kinetic energy to heat energy
(c) potential energy to sound energy
(d) chemical energy to kinetic energy

Which of the following energy change involves frcitional force ?

(a) chemical energy to heat energy

(b) kinetic energy to heat energy

(d) chemical energy to kinetic energy

A ball falls to the ground as shown below :

(a) What is the kinetic energy of ball when it hits the ground ?

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Q. A ball falls to the ground as shown below:

(a) What is the kinetic energy of ball when it hits the ground?
(b) What is the potential energy of ball at B?
(c) Which law you have made use of in answering this question?

(a) Explain by an example what is meant by potential energy. Write down the expression for gravitational potential energy of a body of mass m placed at a height h above the surface of the earth.

(b) What is the difference between potential energy and kinetic energy?

(c) A ball of mass 0.5 kg slows down from a speed of 5 m/s to that of 3 m/s. Calculate the change in kinetic energy of the ball. State your answer giving proper units.

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