pls help me its urgent pls solve all these questions
1) What are the two forms of mechanical energy?
2) Distinguish between Potential energy and Kinetic energy.
3) Name the type of energy (potential energy or kinetic energy) possessed in the following cases :
a. A moving bus.
b. An arrow shot out of a bow.
c. A compressed spring.
d. A moving cricket ball.
e. A stretched wire.
f. A piece of stone placed on the roof.
1) Find the gravitational potential energy of 1 kg mass kept at a height of 5 m above the ground if g = 10 ms-2
2) A box of weight 150 kgf has the gravitational potential energy stored in it equal to 14700 J. Find the height of the box above the ground. (g = 9.8 N kg-1).
3) A vessel containing 50 kg of water is placed at a height of 15 m above the ground. What will be the gravitational potential energy of water in the vessel. ( g = 10 m s-2 ).
4) A ball of mass 0.5 kg slows down from a speed of 5 ms-1 to that of 3 ms-1 . Calculate the change in kinetic energy of the ball.
Answers
Answer:
1) the 2 form of mechanical energy are
•potential energy
•kinetic energy
2) photo
3)a- kinetic energy
b- kinetic energy
c- potential energy
d- kinetic energy
e- potential energy
f- potential energy
4)photo
5)photo
6)photo
7) photo
hope it helps you dear
1.Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).
2.Potential Energy is the stored energy in an object or system because of its position or configuration. Kinetic energy of an object is relative to other moving and stationary objects in its immediate environment. ... Kinetic energy can be transferred from one moving object to another, say, in collisions.
3.compressed spring=potential energy
stretched bow= Potential energy
moving arrow= Kinetic energy
water stored in a dam= Potential energy
a stone at the top of a building= Potential energy
Bird resting on the branch of a tree= Potential energy ( extra example )
1.Gravitational potential energy = mass (m) × gravity (g) × height (h)
= (1× 10 × 5) J
= 50 J
2.A box of weight 150 kgf has gravitational potential energy stored in it equal to 14700j
hope this answer is helpful