Answer:
The force needed to push a block of ice is 100 N.
Explanation:
It is given that,
Length of the friction less plane, l = 6 m
Height of the wall, h = 2 m
Weight of the block of ice, W = 300 N
The length of the inclined plane and the height of the wall act as hypotenuse and the perpendicular of the right angled triangle. Using trigonometry to find the angle as :



Force needed to push a block of ice weighing 300 N up the plane is equal to the horizontal component of the force as :



So, the force needed to push a block of ice is 100 N. Hence, this is the required solution.
Answer:
B
Explanation:
A solenoid is the wraps of conducting wire wrapped around the metal core .
Answer:
Friction works against the motion and acts in the opposite direction. When one object is sliding on another it starts to slow down due to friction. ... By rubbing them together we generate friction and, therefore, heat. The force F of friction pushes back on the block
Explanation:
First one I believe but im not completely sure