A force of 6N acts horizontally on a stationary mass of 2...
A force of 6N acts horizontally on a stationary mass of 2kg for 4s. The kinetic energy gained by the mass is _________
366j
240j
144j
90j
Correct answer is C
F = 6N, m = 2kg, t = 4s, u = 0 (stationary or at rest)
K.E | = | 1
2 |
mv2 |
F | = | mv
t |
from rest
K.E | = | 1
2 |
m( | Ft
m |
)2 | = | 1
2 |
× | 2 x (6×42)2=122=144J |
Calculate the effective capacitance of the circuit in the diagram given ...
The images formed by a diverging lens are always ...
A concave mirror forms a magnified and errect image only when the object is placed ...
Heat is supplied uniformly at the rate of 100W to 1.0 x 10−2kg of a liquid for 20 seconds. If...