Final answer:
To calculate the force of friction on a skidding 1000 kg car, the coefficient of friction and the normal force must be known. Typically, with the coefficient of friction provided, the force of friction can be found by multiplying it with the car's weight.
Step-by-step explanation:
To determine the magnitude of the force of friction on a 1000 kg car while it is skidding to a stop on a dry concrete road, we need to know additional information such as the deceleration or the distance over which the car skidded. However, if we were provided with the coefficient of friction (μ) between the tires and the concrete, we could use the equation μ × normal force (weight of the car) to calculate the frictional force. For example, if the coefficient of friction is 0.62 (a typical value for rubber on dry concrete), then the frictional force F would be calculated as F = μ × m × g, where m is the mass (1000 kg) and g is the acceleration due to gravity (9.8 m/s²). Without the coefficient of friction or deceleration information, we cannot provide a specific numerical answer.