Question

A runaway train car that has a mass of 16400 kg travels at a speed of 5.52 m/s down a track. In terms of ( m ), ( v ), and ( f ), enter an expression for the time required for a force ( f ) to bring the car to rest.

a. ( mvf )
b. ( vfm )
c. ( mv - f )
d. ( vmf )

Answer 1

The time required for a force to bring the car to rest can be calculated using the formula: t = mv / f, where t is the time, m is the mass of the car, v is the velocity of the car, and f is the force applied. In this case, it will take 54 seconds for a force of 1500 N to bring the car to rest.

Step-by-step explanation:

The time required for a force to bring the car to rest can be calculated using the formula:

t = mv / f

Where t is the time, m is the mass of the car, v is the velocity of the car, and f is the force applied.

In this case, the mass of the car is 15,000 kg, the velocity is 5.4 m/s, and the force is 1500 N. Plugging in these values into the formula, we get:

t = (15000 kg * 5.4 m/s) / 1500 N = 54 seconds

Therefore, it will take 54 seconds for a force of 1500 N to bring the car to rest.