# An electric toy car with a mass of #5 kg# is powered by a motor with a voltage of #8 V# and a current supply of #7 A#. How long will it take for the toy car to accelerate from rest to #7 m/s#?

The time is

The power of the motor is

The kinetic energy of the car is

But,

By signing up, you agree to our Terms of Service and Privacy Policy

To find the time it takes for the toy car to accelerate from rest to 7 m/s, you can use the formula $t = \frac{m \cdot v}{F}$, where $t$ is the time, $m$ is the mass of the car, $v$ is the final velocity, and $F$ is the force applied. First, calculate the force using the formula $F = m \cdot a$, where $a$ is the acceleration. Then, use Ohm's law to find the power $P$ of the motor, where $P = V \cdot I$. Finally, use the equation $P = F \cdot v$ to solve for $a$. Once you have $a$, plug it into the first equation along with the given values to find $t$.

By signing up, you agree to our Terms of Service and Privacy Policy

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.

- How much power is produced if a voltage of #12 V# is applied to a circuit with a resistance of #288 Omega#?
- A positive charge +q is brought closer to a negative charge -Q. As the charge +q gets closer ti the charge -Q, will the electric potential energy increase or decrease?
- A charge of #8 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #32 J# to #12 J#, what is the voltage between points A and B?
- A circuit with a resistance of #6 Omega# has a fuse melts at #6 A#. Can a voltage of #48 V# be applied to the circuit without blowing the fuse?
- Why the capacity of batteries are measured in #Ah# (Ampere hour) and not #A/h# (Ampere per hour) ?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7