Answer:
so the height will be increased by 9 times
Explanation:
The truck is in its pontential energy at rest
The potential energy is converted to kinetic energy when in motion
Given that,
h = height of the hill
m = mass of the truck
g = acceleration due to gravity
v = velocity of the truck at the bottom of the hill.
At the top of the hill,
Potential energy(PE) = mgh
Kinetic energy(KE) = 0
Total energy, E = PE + KE = mgh + 0 = mgh____(1)
At the bottom of the hill :
Potential energy, PE = 0
Kinetic energy,KE = (1/2)mv²
Total energy, E = PE + KE
= 0 + (1/2)mv²_____(2)
In law of conservation of energy,
(1) = (2)
mgh = (1/2)mv²
h = (1/2g)v²
given,
v = 2 m/s
g = 9.81 m/s²
h = (1/2(9.81)) × 2²
h = 0.20 m
so,
if v = 6 m/s
h = (1/2(9.81)) × 6²
h = 1.83 m
from the first h = 0.20m and the second h = 1.83m
1.83m / 0.20m
= 9.15
so the height will be increased by 9 times
The decimal can be in the wrong place
Answer
given,
mass of the cat = 8 kg
length of the ramp = 2 m
inclined at = 19°
force exerted = 60 N
cat is moving at speed = 2 m/s
velocity when it reaches at the top = ?
using work energy theorem
work done by the gravity = - mgL sin θ
total work (w)
= F x - mgL sin θ
= 60 x 2 - 8 x 9.8 x 2 sin 19°
= 68.95 J
initial kinetic energy
change in kinetic energy is work done
v = 4.61 m/s
Answer:
Sample Response: The picnic table is a biotic factor because it is made from trees that were once living in the forest.
Explanation:
What are we supposed to answer ? is there supposed to be a picture?
