Increasing the level of an incline:
Increases final velocity
Increases the work done
Increases the initial potential energy
Increases the final kinetic energy
Answer:
D. Salt Weathering
Explanation:
Salt weathering is defined as a geomorphic process resulting in the physical disintegration of rocks or stones and in the fretting of their surfaces. Often you tend to find the best examples of salt weathering in dessert areas and coastal areas. You can find three distinct types of weathering which are biological weathering, physical weathering, and chemical weathering.
To solve this problem we will apply the concept related to the moment, which describes the change in speed in proportion to the body mass. The momentum can be described under the general equation

Where,
m = mass
v = Velocity
The change in momentum is the difference between the final moment and the initial moment

Where,
Final momentum
Initial momentum
After catching the ball, the ball comes to rest position and speed of the ball is zero.

The change in momentum on catching the ball is


The momentum during the catching of the ball is

Now during deflection of the ball, we know that there is an initial momentum and a negative final momentum because it moves with the same speed but in the opposite direction, that is

The momentum is negative since during deflection the ball moves with same speed in opposite direction


Therefore, the correct ansswer is B: catch the ball in order to minimize your speed on the skateboard
Answer: 4.76 watts
Explanation:
Work = 1000 J
Time = 3.5 minutes (210 seconds)
Since the SI unit of time is seconds, 210 seconds will be used in calculation.
Power output of the machine = ?
Recall that power is the rate of doing work. Thus, power is Workdone divided by time taken.
i.e Power = (work/time)
Power = 1000J/210seconds
Power = 4.76 watts
Thus, the power output of the machine is 4.76 watts