Recall that power is the amount of work done per unit time,
P
=
W
t
When you're lifting a box, you're working against gravity. If you displace a box
1.5
m
in the positive direction, you're doing,
W
=
200
N
⋅
1.5
m
⋅
cos
(
0
°
)
≈
300
J
of work in one second.
Hence, the power required to execute this lift is approximately,
300
J
1.0
s
≈
300
W
Answer:
A. Its translational kinetic energy is larger than its rotational kinetic energy.
Explanation:
Given that
Radius = R
Mass = M
We know that mass moment of inertia for the solid sphere
Lets take angular speed =ω
Linear speed =V
Condition for pure rolling , V= ω R
Rotation energy ,RE
RE= 0.2 MV²
The transnational kinetic energy TE
TE= 0.5 MV²
From above we can say that transnational energy is more than rotational energy.
Therefore the answer is A.
Hi, we can do a comparisson. Recall that potential energy is defined as m*g*h where m is the mass in kg, g is gravitational acceleration (9.8m/s^2) and h is the height therefore:
A:B:C:D=30×g×1.5:20×g×2:30×g×2:20×g×1.5 since all of them have the term of g, we can "kill" the term hence we have that:
A:B:C:D=45:40:60:30 hence we know the option c has the most potential energy
Answer:
B) trenches
Explanation:
New oceanic crust is formed and pushes the old oceanic crust down into a trench.
Helping verbs come before the main verb, the main verb in the sentence is repair therefor the helping verb would be could.