Work, Energy & Power

Question 1

What is the SI unit for energy

Answer 1

Joules (J)

Question 2

Energy can be
expressed more
specifically by using
the term _______.

Answer 2

WORK(W)

Question 3

3 types of Formula for work

Answer 3

W = Fxcosθ
W=▲KE
W= Fd

Question 4

Formula for area

Answer 4

A = Base x Height

Question 5

Formula for power

Answer 5

P = W/Δt
P = Fv = W/t = mgh/t

Question 6

________ is the physical quantity that enables a person or an object to do work.

Answer 6

Energy

Question 7

_____________, which is the energy possessed by an object due to its position or due to its motion.

Answer 7

Mechanical energy

Question 8

It is an energy in motion

Answer 8

Kinetic energy

Question 9

It is a stored energy

Answer 9

Potential energy

Question 10

Formula for Kinetic Energy

Answer 10

KE = 1/2 𝑚𝑣 ^2

Question 11

Formula for ▲KE

Answer 11

▲KE= 1/2 𝑚𝑣𝑓^2 −1/2 𝑚𝑣𝑜^2

Question 12

Formula for force

Answer 12

F=ma

Question 13

Formula for Vf^2

Answer 13

𝑣𝑓^2 = 𝑣𝑜^2 + 2𝑎d

Question 14

It is the energy stored in an object due to the Earth’s gravity

Answer 14

Gravitational Potential Energy

Question 15

It is the energy stored in an object due to its deformed state.

Answer 15

Elastic Potential Energy

Question 16

2 Types of Potential energy

Answer 16

Gravitational Potential Energy
Elastic Potential Energy

Question 17

Formula for Gravitational Potential Energy

Answer 17

PEg = mgh

Question 18

Formula for Elastic Potential Energy according to hooke’s law

Answer 18

Fs=kx

Question 19

SI unit for k in Elastic Potential Energy

Answer 19

N/m

Question 20

SI unit for x in Elastic Potential Energy

Answer 20

m

Question 21

The other formula for Elastic Potential Energy

Answer 21

PEs = 1/2 𝑘𝑥^2

Question 22

Formula for acceleration

Answer 22

F/m