Answer:
Option (D)
Explanation:
In the projectile motion
Horizontal distance = horizontal velocity × time
3.3 = u × 0.66
u = 5 m/s
Muzzle velocity is 5 m/s
Answer:
6.03 m
Explanation:
First of all, let's convert the angular velocity from revolutions per minute to radians per second:
The frictional force on the block ranges from zero to a maximum value of
In order for the block to remain stuck on the turntable, the frictional force must be equal to the centripetal force, so we can write:
where
m is the mass of the block
is the angular velocity
r is the distance of the block from the centre
is the coefficient of static friction
g = 9.8 m/s^2
Solving for r, we find:
Answer:
21.02986 °C
Explanation:
c = Specific heat of water at 15 °C = 4186 J/Kg°C
= Change in temperature
= Initial temperature = 21 °C
= Final temperature
m = Mass of person =
t = Time taken = 30 minutes
Heat is given by
The water temperature after half an hour is 21.02986 °C
Answer:
25N.s=25kgm/s
Explanation:
The resulting momentum in this case is equal to the impulse created by the force 5N during 5 seconds
ΔP=Force.time=F.t
= 5x5=25kgm/s