Answer:
False
Explanation:
It is better to be logical when proving a point
Answer:
<em>The second option has a lower power output. P=30 W</em>
Explanation:
<u>Mechanical Power
</u>
It is a physical magnitude that measures the rate a work W is done over time t.
Since W=F.d
The first option means the worker will lift the box by a distance of 1.2 meters in 3 seconds by applying 250 N of force. That produces a power of
The second option requires the worker applies 75 N of force and travel a distance of 4 meters for 10 seconds, thus the power is
The second option has a lower power output
Answer:
C
Explanation:
When a ball rolls down a hill, Potential Energy Conversion takes place to Kinetic Energy.
Answer:
Max. = 13 N
Mjn. = 3 N
Explanation:
Max. resultant will be when these forces are being applied in the same direction(along the same line), we'll simply sum up the forces to get the resultant in this case.
= 5 + 8
= 13 N
Min. resultant will be when these forces are being applied in opposite directions (the forces must be present along the same line).
We'll subtract them to get the resultant now
= 8 - 5
= 3 N
average speed = (distance covered) / (time to cover the distance)
The position at the end of the first hour is the first little circle on the graph <u>after </u>the beginning point at (0, 0).
It's at the point (1 hour, 40 miles) .
So the average speed for the first hour is (40 miles) / (1 hour)
<em>Speed = 40 mph.</em>