Work, Power and EnergyHard
Question
A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3N at right angles to each other. The kinetic energy of the body at the end of 10 sec is :-
Options
A.100 J
B.300 J
C.50 J
D.125 J
Solution
a = 
m/s2
v = u + at = 0 +
10 = 5m/s
so K.E. =
10(5) = 125N
m/s2v = u + at = 0 +
10 = 5m/sso K.E. =
10(5) = 125NCreate a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
A gun of mass 10 kg fires four bullets per second. The mass of each bullet is 20 g and the velocity of the bullet when i...A Carnot engine works first between 200oC and 0oC and then between 0oC and -200oC. The ratio of its efficiency in these ...Force F on a particle moving in a straight line varies with distance d as shown in figure.The work done on the particle ...Light of wavelength 0.6 μm from a sodium lamp falls on a photocell and causes the emission of photoelectrons for wh...If ᐃQ and ᐃW represent the heat supplied to the system and the work done on the system respectively, then th...