An electric toy car with a mass of #3 kg# is powered by a motor with a voltage of #7 V# and a current supply of #5 A#. How long will it take for the toy car to accelerate from rest to #4 m/s#?
The time is
The power is
The kinetic energy is
But,
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To calculate the time it takes for the toy car to accelerate from rest to 4 m/s, you can use the formula: ( t = \frac{v_f - v_i}{a} ), where ( v_f = 4 , \text{m/s} ), ( v_i = 0 , \text{m/s} ), and ( a ) is the acceleration. To find acceleration, use the formula ( a = \frac{F}{m} ), where ( F ) is the force and ( m ) is the mass. The force can be calculated using ( F = I \cdot V ), where ( I ) is the current and ( V ) is the voltage. Plug in the given values to find acceleration, then use it to find the time.
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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.
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.
- A charge of #2 C# is at #(4 , -6 )# and a charge of #-1 C# is at #( 2,-5 )#. If both coordinates are in meters, what is the force between the charges?
- A circuit with a resistance of #8 Omega# has a fuse with a capacity of #5 A#. Can a voltage of #10 V# be applied to the circuit without blowing the fuse?
- How much power is produced if a voltage of #10 V# is applied to a circuit with a resistance of #25 Omega#?
- A charge of #4 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #38 J# to #13 J#, what is the voltage between points A and B?
- How much power is produced if a voltage of #8 V# is applied to a circuit with a resistance of #4 Omega#?

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