Mike enters a revolving door that is not moving. Mike should
push at the edge of the door where it is largest distance from the pivot point
in order to produce a torque with the least amount of force. Torque is equal to
t = force x distance.
9,000/12=750
Speed is equal to distance divided by time
We have that a blackbody radiator either constantly absorbs energy or constantly emits energy, depending on its surroundings. In this case, the energy is continuously and smoothly decreasing, thus it cannot be like B and C.
The energy loss or gain is also monotonous, it has the same direction; a radiator cannot gain energy at some point and then lose some. Hence, it does not resemble a wave either. The most appropriate model is the ramp. Energy is constantly emitted to surroundings and it decreases monotonically.
Answer:
The distance and average speed are 54.79 m and 10.85 m.
Explanation:
Given that,
Speed = 21.7 m/s
Time = 5.05 s
(a). We need to calculate the distance
Firstly we will find the acceleration
Using equation of motion


Where, v = final velocity
u = initial velocity
t = time
Put the value in the equation


Now, using equation of motion again
For distance,



The distance is 54.79 m.
(b). We need to calculate the average speed during this time

Where, D = total distance
T = time
Put the value into the formula


Hence, The distance and average speed are 54.79 m and 10.85 m.
N<span>o net external force acts on the system </span>