Answer:
length of rope is 13.04 feet
Explanation:
Given data
high = 7 feet
from the bottom = 11 feet
to find out
length of rope
solution
we use here Pythagorean Theorem
we know length of rope is here hypotenuse
so h² = 7² + 11²
so h =
h =
h = 13.038 ft
so length of rope is 13.04 feet
Pressure = Force / Area
Put your data in front of yourself.
Force = 600 Newtons
Area = 300 cm^2
Firstly you need to convert the area into m^2 and you do this by diving 300 with 10000.
Now you use the formula:-
Pressure = 600/ 0.03
Which comes out to be 20,000 Pa.
Hope this helps!
Add the KE increase and the work done against friction.
The final velocity is twice the average, or 3.0 m/s
The final KE is (1/2)*25*3^2 = 112.5 J
The friction work done is 6*3.8 = 22.8 J
hope this is correct
Heating up water in a pot on a stove
Momentum of the bullet is m×v = 0.01 kg × 800 m/s = 8 kgm/s
so momentum of baseball also= 8 kgm/s
8= mass of baseball × velocity
8= 0.145 × v
on solving for v,
v= 55.17 m/s which is the required velocity
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