Answer:
1.52 m
Explanation:
We are given that
Maximum force=F=679 N
Mass of rock ,m=385 kg
Distance,d=0.233 m
We have to find the minimum total length L of the rod required to move the rock.
Torque on rock=
Where 
Torque on man=
Hence, the minimum total length of rod=1.52 m
The initial temperature of the bar is 25. To get to the t temperature you need to add (t-25) degrees Celsius.
for 1 degree................... 7 Joules
y given degree........ p Joules
p=7y
In our case y=(t-25) .
h(t) = 7(t-25) which is the final answer.
Answer:
The heat causes the molecules on rubbing surfaces to move faster and have more energy.
Answer:
the relative speed should be 40mph
Explanation:
Answer:
It cannot be constant because if it does not change and each time it increases its strength and speed.
Explanation:
