
QUESTION 1 Calculate the kinetic energy of a car (mass 2500 kg) travelling at a speed...
An asteroid with a mass of 2500 kg has a relativistic kinetic energy of 1 .5 Calculate the speed of the asteroid. M [ans: 0.80d
Calculate the kinetic energy (in kJ) of a 3000 kg car that is traveling at a speed of 53 km/hr.
#1 a) Calculate the difference in kinetic energy when a 1300 kg car changes its speed from 90.0 m/s to 50.0 m/s. b) How much work is done on the car by friction force between the tires and road? Specify the sign of work. please answer both as they go together
P4.4 Calculate {a} the kinetic energy of an 85.0-kg athlete running at a speed of 10.0 m/s and (b) the kinetic energy of a 60.0-kg cheetah running at 31.0 m/s. (c) Compare the kinetic energy of the cheetah to the kinetic energy of the athlete.
1. A car, travelling at 30m/s slows to 10m/s in 5 seconds. What was the acceleration? A). -6 m/s B) 4m/s C).-2 m/s D). -9.8m/s 2. A ball thrown straight up takes 3 seconds to reach its maximum height. The height is most nearly B). 45m C). 60m D), 90 m A). 30m 3. A driver of a car wishes to pass a truck on the highway. Her car can accelerate at a constant 5m/s'. How long does it take...
Calculate the rotational kinetic energy of a tire with a mass of 20.0 kg and a radius of 0.25m if the car is moving forward with a constant velocity of 8.5 m/s.
12) A ball of mass 1 kg travelling right at 2 m/s collides elastically with a ball of mass 2 kg travelling left at 1 m/s. After the collision, what is the total kinetic energy of the two balls? A) OJ D 1
(a) Find the linear momentum and kinetic energy of a bullet of mass 4.90 10-2 kg moving at a speed of 315 m/s. linear momentum = kinetic energy = (b) Find the linear momentum and kinetic energy of a football player of mass 110 kg moving at a speed of 10.0 m/s. linear momentum = kinetic energy = (c) Find the linear momentum and kinetic energy of a truck of mass 1.00 104 kg moving at a speed of 20.5...
At what speed does 1600 kg compact car have the same kinetic energy as a 1.80 Times 10^7 kg truck going 24.0 km/hr? A 61kg student is standing at Op a spring in an elevator that is accelerating u? Ward at 3.1 m/s^2. The spring constant is 2600 N/m By how much is the spring compressed? A 13 kg ru? Way grocery cart into a spring with spring constant 250 N/m and compresses it by 61 cm. What was the...
1). the roller coaster car with a mass of 250 kg starts with an initial speed v0 = 5.6 m/s at the top of the track . What is its speed (in m/s) at the lowest point of the track (which is 25m below the start point)? Keep 2 decimal places. 1 b) Recall what you learned in vertical circular motion. If the lowest part of the track is approximated as circular with a radius of 6.20 m, What is the...