Answer:
d,a,g,c,f,b,f,e. hope this helps
Explanation:
Answer:
A. 3.3 m
Explanation:
Here, we have to use conservation of energy principle.
When the ball is at maximum height, the instantaneous velocity at that point is 0 m/s. So, the kinetic energy of the ball is also 0 at the maximum height. Thus, at maximum height, the energy possessed by the ball is gravitational potential energy only.
Now, when the ball reaches the ground, all the gravitational potential energy changes into kinetic energy because of the conservation of energy.
Therefore, the energy transformation can be given as:
Decrease in potential energy = Increase in Kinetic energy
Decrease in potential energy is given as:
Increase in kinetic energy is given as:
Therefore,
Now, plug in 8 for , 9.8 for and solve for height . This gives,
Therefore, the maximum height reached by the ball is 3.3 m.
The same amount of work being done over a longer period of time we must have power.
Answer:
The speed of the rod is 2.169 m/s.
Explanation:
Given that,
Mass = 0.100 kg
Current = 15.0 A
Distance = 2 m
Length = 0.550 m
Kinetic friction = 0.120
(a). We need to calculate the magnetic field
Using relation of frictional force and magnetic force
Where, l = length
i = current
m = mass
Put the value into the formula
(b). If the friction between the rod and rail is reduced zero.
So,
We need to calculate the acceleration
Using formula of force
Put the value into the formula
We need to calculate the speed of the rod
Using equation of motion
Put the value into the formula
Hence, The speed of the rod is 2.169 m/s.
Answer:
33 hours or equivalently: 1980 minutes
Explanation:
Use the formula for movement under constant velocity, as the velocity equal the distance traveled divided by the time it took, and solve for the unknown time (t):
which can also be given in minutes as : 33 x 60 = 1980 minutes