work done and K.E Flashcards
1
Q
WHEN work is said to done
A
work is done only when constant force applied on object
2
Q
what is NOT work done
A
- you push against the wall
- jumping continuously on same spot
- holding chair and walking around classroom
3
Q
formula of WORKDONE
A
workdone= constant force x distance
4
Q
JOULES equal to
A
NEWTON INTO meter
5
Q
ENERGY
A
Capacity to do work
6
Q
Unit of energy
A
JOULES
7
Q
Kinetic Energy
A
form of energy possessed by a body in a motion
8
Q
K.E depends on
A
- MASS of body
- VELOCITY of body
9
Q
relation of K.E and mass/velocity
A
directly propostional
10
Q
formula of K.E
A
1/2 mv^2
11
Q
mass doubled in K.E
A
K.E will be doubled
12
Q
velocity doubled in K.E
A
K.E increased by 4 time
13
Q
POTENTIAL ENERGY
A
energy possessed by object as result of position and condition
14
Q
GRAVITATIONAL P.E
A
energy possessed by object due to its position
15
Q
GPE at ground level
A
assumed to be zero GPE
16
Q
object lifted at certain height
A
GPE increase
17
Q
P.E formula
A
mgh
18
Q
conversation of KE to PE
A
- Roller coaster
- falling object
