In swinging pendulum if air friction or air resistance is not present then we can say that sum of its kinetic energy and potential energy will always remains constant
Here it will show that kinetic energy of pendulum will convert into potential energy and vice versa during its to and fro motion
Like here we can say that if the pendulum is released from rest from its one of the extreme position then its kinetic energy will keep on increasing till it will reach at the lowest position while its potential energy is decreasing to the least at the lowest position
Now once it again start rising towards other extreme then again its potential energy start increasing and kinetic energy again start decreasing
At the other extreme position the kinetic energy of the pendulum becomes zero again and potential energy is maximum again
So here since no air friction so we can say that mechanical energy of the pendulum will remain constant at all the time
Only ' A ' is always true.<em> (choice-1)</em>
' B ' is not true when you drop a red hot spoon into cold soup.
' C ' is not true when you drop a red hot marble into a cool swimming pool.
Answer:
Acceleration of Truck = 0.56 m/s²
Explanation:
Given information:
Mass of truck = 1,000 kilogram
Net force applied by Truck = 560 N
Find:
Acceleration of Truck
Computation:
Force = Mass x Acceleration
Net force applied by Truck = Mass of truck x Acceleration of Truck
560 = 1,000 x Acceleration of Truck
Acceleration of Truck = 560 / 1,000
Acceleration of Truck = 0.56 m/s²
Answer:
Explanation:
Provided the car did not collide with anything during its slide,
Kinetic energy will convert to work of friction
½mv² = Fd
½mv² = μmgd
v = √(2μgd)
v = √(2(0.300)(9.81)(28.0))
v = 12.8377...
v = 12.8 m/s