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Potential energy can be converted to kinetic energy. A)True B)False

A spring with a spring constant of 144 N/m is compressed by a distance of 16.5 cm. How much elastic potential energy is stored in the spring?

The near point of hypermetropic eye is 75 cm from the eye. What is the power of the lens required to enable him to read clearly a book held at 25 cm from the eye? A) +3 D
B) -2.5 D
C) +2.66 D
D) -2.66 D

What is constant speed?

Which of the following statements are correct about the circuits shown in the figure where 1Ω and 0.5Ω are internal resistances of the 6 V and 12 V batteries respectively
A) The potential at point P is 6 V
B) The potential at point Q is - 0.5V
C)If a voltmeter is connected across the 6 V battery, it will read 7 V
D)If a voltmeter is connected across the 6 V battery, it will read 5 V

If i am sitting without doing anything, will i have potential energy in me? We will requore energy to do work. So what is that energy called that you use before producing kinetic energy? Will i have kinetic energy of i apply any kind of force (muscular, gravitational and so on)

The small piston of a hydraulic lift has an area of $0.20m^2$. A car weighing $1.20\times {10}^{4}N$ sits on a rack mounted on the large piston. The large piston has an area of $0.90m^2$. How much force must be applied to the small piston in order to support the car?

When a mass m is hung from a spring of negligible mass with a force constant k, it extends by an amount y. The mass is gently drawn down and released. The system begins to execute simple harmonic motion of amplitude A and angular frequency ω. The total energy of the mass - spring system will be
A) $\frac{1}{2}m{A}^2{\mathrm{\omega <!--\; \omega \; -->}}^2$
B) $\frac{1}{2}m{A}^2{\mathrm{\omega <!--\; \omega \; -->}}^2+\frac{1}{2}k{y}^2$
C) $\frac{1}{2}k{y}^2$
D) $\frac{1}{2}m{A}^2{\mathrm{\omega <!--\; \omega \; -->}}^2-<!--\; -\; -->\frac{1}{2}k{y}^2$

A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is:
a) 80 J
b) 32 J
c) more than 80 J
d) 8 J
e) 6 J

What has the most kinetic energy?
A. particles of ice $0°\mathrm{C}$
B. particles of water at $0°\mathrm{C}$
C. particles of water at hundred degrees Celsius
D.particles of steam at a hundred degrees Celsius

What is the unit of potential energy?

A 5 kg box is pushed 3 meters across the floor by a force of 10 N. How much work is done on the box?
A 5 kg is pushed 3 meters across the floor by a force of 10 N in 6 seconds. How much power output is exerted on the box?br>A 20 kg cart is moving at 2 m/s. How much kinetic energy does it have?br>An elevator lifts a 50 kg person from the ground level to a point where they have 10,000 J of gravitational potential energy. How much work did the elevator do on the person?
If car A is 500 kg traveling at 5 m/s hits car B, 250 kg moving in the same direction at 2 m/s, what is the initial momentum of car A?

Moving train has mechanical energy in the form of only potential energy.
True or False

How does potential energy increase with increase in height. What is the logic.

What're the five different types of energy?

What's is mechanical force?

The magnitude of the action potential is correlated with the strength of the stimulating input. True of false

The sum of potential and kinetic energy is known as total mechanical energy. True or False

Theoretical question:Name the largest and smallest practical units of energy.

What is kinetic energy, gravitational potential energy, total energy and Law of Conservation of Energy