Answer:
Final kinetic energy,
Explanation:
It is given that,
Kinetic energy of toy car, 
Frictional force, F = 0.5 N
Distance, d = 6 m
We need to find the kinetic energy after this frictional force has acted on it. We know that frictional force is an opposing force. The work done by the toy car is given by :


W = -3 J
We know that the work done is equal to the change in kinetic energy. Let
is the final kinetic energy.



So, the final kinetic energy is the toy car is 5 J. Hence, this is the required solution.
calculate the power per hour of a radiator, knowing that it is connected to a common 110 v contact. and requires 20 Amp.
Answer:
2.2kWh
Explanation:
Given parameters:
Potential difference = 110v
Current = 20A
Unknown:
Power = ?
Solution:
To solve this problem, we use the expression below:
Power = IV
Power = 110 x 20 = 2200W
This is therefore 2.2kW
Power per hour = 2.2kWh
Since the anode dissolves and goes to the cathode. The object to be electroplated is kept at the cathode.
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