42.9°
Explanation:
Let's assume that the x-axis is aligned with the incline and the positive direction is up the incline. We can then apply Newton's 2nd law as follows:
Note that the net force is zero because the block is moving with a constant speed when the angle of the incline is set at Solving for the angle, we get
or
Answer:
Explanation:
Given
velocity of skateboarder is 4.1 m/s
Force
time=20 s
As the motion is along x axis therefore
Power
Power
only x component of force comes into play because there is no motion in Y direction.
Work done will be
Work done on skate boarder by rope is 1148 J
and work done on bicyclist by rope is -1148 as the direction of velocity is opposite to applied force
Answer:
Liquids are more dense than gases, but less dense than solids, so sound travels 2nd fast in liquids. Gases are the slowest because they are the least dense: the molecules in gases are very far apart, compared with solids and liquids.
Explanation:
Energy is the ability to do work.
So work can not be done without the transfer of energy from one body to another.
Work is the transfer of energy.