Answer: The fan converts electric energy into kinetic energy that does work, and it converts some electric energy into heat.
Answer:
F = 18 N
Explanation:
We have,
Mass of a dresser is 36 kg
Acceleration produce on the dresser is
It is required to find the force being applied on it. The force acting on an object is given by :
F = ma
So, the force of 18 N is applied to it.
Think MPH on a car, The Faster you go the less time it takes to get there. For example, the car again, if a red and blue car are both start in Arizona and want to go to Disney Land they leave the same at the same time but the Blue car goes 50 mph and the Red car 75 mph. The Red car will get there first.
Answer:
I₁ =1250 kg.m²
Explanation:
Given that
Angular speed of Merry ,ω₁= 0.2 rad/s
Angular speed of technician ,ω₂= 0.04 rad/s
Moment of the inertia of the technician ,I₂= 5000 kg.m²
Lets assume that
Moment of the inertia of merry with respected to the ground=I₁
There is no any external torque ,that is why angular momentum of the system will be conserve.
Now by conserving angular momentum
I₁ ω₁=(I₁+I₂)ω₂
I₁ x 0.2 = (I₁ +5000 ) x 0.04
I₁ (0.2-0.04) = 5000 x 0.04
I₁ =1250 kg.m²
<h2>Book will hit the foot with force 21.8 N</h2>
Explanation:
The momentum of any object = m v
here m is the mass of body and v is its velocity
Thus momentum P = 3.2 x 1 = 3.2 kg-m
As the book is falling freely , so it will fall with and acceleration g
The force exerted by it is = m g
Thus force = 2.18 x 10 = 21.8 N