# An electric toy car with a mass of #6 kg# is powered by a motor with a voltage of #7 V# and a current supply of #3 A#. How long will it take for the toy car to accelerate from rest to #4 m/s#?

The power input is the product of the voltage and the current.

The change in kinetic energy for the car is

Thus, the time needed is the energy divided by the power.

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It will take approximately 2.33 seconds for the toy car to accelerate from rest to 4 m/s.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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- A charge of #12 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #36 J# to #18 J#, what is the voltage between points A and B?
- What happens when you bring a negatively charged object close to a neutral pith ball?
- A circuit with a resistance of #8 Omega# has a fuse with a capacity of #3 A#. Can a voltage of #22 V# be applied to the circuit without blowing the fuse?

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