A 2500 kg car is traveling 25 m/s and brakes to a stop. This causes the...
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2500 kg car is traveling 25 m/s and brakes to a stop. This causes
the...
A 1200 kg car traveling at 60 mph quickly brakes to a halt. The kinetic energy...
A 1200 kg car traveling at 60 mph quickly brakes to a halt. The kinetic energy of the car is converted to thermal energy of the disk brakes. The brake disks (one per wheel) are iron disks with a mass of 4.0 kg. Estimate the temperature rise in each disk as the car stops. Express your answer using two significant figures.
A 1,210 kg car going 32 m/s is brought to a stop using its brakes. Let's...
A 1,210 kg car going 32 m/s is brought to a stop using its brakes. Let's assume that a total of approximately 28 kg of iron in the brakes and wheels absorbs the heat produced by the friction. (a)What was the car's original kinetic energy (in J)? ________J (b)After the car has stopped, what is the change in temperature (in °C) of the brakes and wheels? ________ °C
2. A 2500 kg car is driving at 65.0 km/h on a horizontal level road. As...
2. A 2500 kg car is driving at 65.0 km/h on a horizontal level road. As it approaches a stoplight the light turns red so the brakes are applied as the car hits a patch ofice. With the brakes locked, the car travels 55.0 m before coming to a stop. A) What is the initial kinetic energy of the car? B) How much work is done by friction in stopping the car? c) What is the force of friction stopping...
A car is 137 m from a stop sign and traveling toward the sign at 25...
A car is 137 m from a stop sign and traveling toward the sign at 25 m/s. At this time, the driver suddenly realizes that she must stop the car. If it takes 0.200 s for the driver to apply the brakes, what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign?
To stop a 2500 kg car traveling at 17 m/s in a time of 9 s...
To stop a 2500 kg car traveling at 17 m/s in a time of 9 s requires an average force of magnitude? Select one: O A. 2400 N O B. 2.73 KN O C. 24.53 KN O D. 4.72 KN
A car is 115 m from a stop sign and traveling toward the sign at 25...
A car is 115 m from a stop sign and traveling toward the sign at 25 m/s when the driver suddenly realizes that she must stop the car and applies the breaks. what must be the constant accelaration of the car after the brakes are applied so that the car will come to rest at the stp sign?
A 0.045 kg aluminum bullet traveling at 471 m/s strikes an armor plate and comes to...
A 0.045 kg aluminum bullet traveling at 471 m/s strikes an armor plate and comes to a stop. If all its energy is converted to heat that is absorbed by the bullet, what is the bullet's temperature change in degrees Celsius?
A 0.047 kg aluminum bullet traveling at 459 m/s strikes an armor plate and comes to...
A 0.047 kg aluminum bullet traveling at 459 m/s strikes an armor plate and comes to a stop. If all its energy is converted to heat that is absorbed by the bullet, what is the bullet's temperature change in degrees Celsius?
A 1890 kg car traveling at 13.3 m/s collides with a 2970 kg car that is...
A 1890 kg car traveling at 13.3 m/s collides with a 2970 kg car
that is initally at rest at a stoplight. The cars stick together
and move 1.96 m before friction causes them to stop. Determine the
coefficient of kinetic friction between the cars and the road,
assuming that the negative acceleration is constant and all wheels
on both cars lock at the time of impact.
A 1890 kg car traveling at 13.3 m/s collides with a 2970 kg...
11. A driver traveling at 27.8m/s tries to stop the car and finds that the brakes...
11. A driver traveling at 27.8m/s tries to stop the car and finds that the brakes have failed. The emergency brake is then pulled and the car comes to a stop in 130 m. Find the car's deceleration.
2. A 2500 kg car is driving at 65.0 km/h on a horizontal level road. As it approaches a stoplight the light turns red so the brakes are applied as the car hits a patch ofice. With the brakes locked, the car travels 55.0 m before coming to a stop. A) What is the initial kinetic energy of the car? B) How much work is done by friction in stopping the car? c) What is the force of friction stopping...
To stop a 2500 kg car traveling at 17 m/s in a time of 9 s requires an average force of magnitude? Select one: O A. 2400 N O B. 2.73 KN O C. 24.53 KN O D. 4.72 KN
A 1890 kg car traveling at 13.3 m/s collides with a 2970 kg car
that is initally at rest at a stoplight. The cars stick together
and move 1.96 m before friction causes them to stop. Determine the
coefficient of kinetic friction between the cars and the road,
assuming that the negative acceleration is constant and all wheels
on both cars lock at the time of impact.
A 1890 kg car traveling at 13.3 m/s collides with a 2970 kg...
11. A driver traveling at 27.8m/s tries to stop the car and finds that the brakes have failed. The emergency brake is then pulled and the car comes to a stop in 130 m. Find the car's deceleration.
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