Question

If a small motor does 520 J of work to move a toy car 260 m, what force does it exert

Answer 1

$Work done = Force\times distance$

From the question,

work done is 520 J

Distance is 260 m

This implies that,

$520 =F\times260$

$F=\frac{520}{260}$

$F=2N$

Hence the motor exerts a force of 2N .

Answer 2

The force exerted by the motor is 2 N.

The work done by the small motor can be calculated using the formula below.

⇒ Formula:

• W = Fd................ Equation 1

⇒ Where:

• W = Work done by the small motor
• F = Force exerted by the motor
• d = Distance moved by the motor.

⇒ Make F the subject of the equation

• F = W/d................ Equation 2

From the question,

⇒ Given:

• W = 520 J
• d = 260 m

⇒ Substitute these values into equation 2

• F = 520/260
• F = 2 N

Hence, The force exerted by the motor is 2 N.

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