Roughly how much worse is a car crash at 50 mph compared to a crash at...
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Roughly how much worse is a car crash at 50 mph compared to a crash
at...
If a car travels 40 mph for the first 50 miles, how fast would it need...
If a car travels 40 mph for the first 50 miles, how fast would it need to travel in the second 50 miles to average 50 mph for the entire 100 mile trip
1. Say there is a 50 lb dog in a car traveling 40 mph. The car...
1. Say there is a 50 lb dog in a car traveling 40 mph. The car comes to an abrupt stop. What is the KE of the dog? 2. Now calculate the KE of a bullet with a mass of 4 grams and a speed of 1000 m/s. Calculate your final results in SI units. How do they compare? What can you conclude from this scenario?
Please show work 3. A car traveling at a constant 39 m/s (-87 mph) passes a...
Please show work
3. A car traveling at a constant 39 m/s (-87 mph) passes a police car that is initially traveling at 25 m/s (55 mph). At the instant of the pass, the police car accelerates at a constant rate of 3.3 m/s in pursuit. We wish to find how much time elapses before the officer catches the car. (a) Identify the initial states when the car passes the police. (b) Define the final state or conditions which enable...
3. A car is traveling at 55 MPH? a) What does it mean to say that this car is traveling at 55 MPH? b) How many mil...
3. A car is traveling at 55 MPH? a) What does it mean to say that this car is traveling at 55 MPH? b) How many miles the car will cover in 120 minutes? 4. You are driving at 18 m/s, and a cat runs out in front of your car. You stop rani which takes 3 seconds, and miss the cat. What is your deceleration? 5. A car traveling in a straight line with an initial velocity of 10...
1.You are driving slowly on the highway at 50 mph when a police car with its...
1.You are driving slowly on the highway at 50 mph when a police car with its lights flashing passes you going 100 mph. Relative to you, the police officer is moving 50 mph. Far in the future, when humans have mastered space travel, an astronaut is moving in a spaceship at half the speed of light, v = c/2, relative to earth, when a light beam sent from earth moving parallel to the spaceship passes it moving at v =...
A 67.0-kg man is driving an 1100-kg car at 40.0 mph when the car hits a...
A 67.0-kg man is driving an 1100-kg car at 40.0 mph when the car hits a 300.0-kg telephone pole and comes to a sudden stop. a. Calculate the impulse needed to stop the man. b. If the man is not wearing a seatbelt and there is no airbag, he will hit the dashboard, which stops him in 5.0 milliseconds. Calculate the force of the dashboard on the man. c. If the person is not wearing a seatbelt, but the airbag...
A car moving at 30 miles/hour has roughly 100,000 J of kinetic energy. You need to...
A car moving at 30 miles/hour has roughly 100,000 J of kinetic energy. You need to keep your foot on the gas to maintain your speed (assume a flat road). The gas you burn represents 500 J of chemical energy every second. (show work) a. After 5 minutes, how much energy have you generated by burning gasoline? b. How much kinetic energy does your car have at this time? c. If this number is not 100,000 J, explain why. If...
Name 37) You have been hired as an expert witness in a crash investigation. Car A of mass 1900 kg crashed into stationary car B of mass 1000 kg. You measure the coefficient of kinetic friction betwee...
Name 37) You have been hired as an expert witness in a crash investigation. Car A of mass 1900 kg crashed into stationary car B of mass 1000 kg. You measure the coefficient of kinetic friction between the locked tires a was in park so the tires did not turn). Car A hits car B, locking bumpers so that they s bef nd the road to be 0.6 (car B kid off together. They skid 20 m ore coming to...
0 to 60 mph in 10 seconds with the A car accelerates smoothly from velocity given in the figure below. Estimate how far the car travels during the 10 -second period. v (mph) 60 40 20 t (sec) 10 5 Rou...
0 to 60 mph in 10 seconds with the A car accelerates smoothly from velocity given in the figure below. Estimate how far the car travels during the 10 -second period. v (mph) 60 40 20 t (sec) 10 5 Round your answer to three decimal places. miles. The car traveled
0 to 60 mph in 10 seconds with the A car accelerates smoothly from velocity given in the figure below. Estimate how far the car travels during the 10...
Please show work 3. A car traveling at a constant 39 m/s (-87 mph) passes a...
Please show work
3. A car traveling at a constant 39 m/s (-87 mph) passes a police car that is initially traveling at 25 m/s (55 mph). At the instant of the pass, the police car accelerates at a constant rate of 3.3 m/s in pursuit. We wish to find how much time elapses before the officer catches the car. (a) Identify the initial states when the car passes the police. (b) Define the final state or conditions which enable...
Please show work
3. A car traveling at a constant 39 m/s (-87 mph) passes a police car that is initially traveling at 25 m/s (55 mph). At the instant of the pass, the police car accelerates at a constant rate of 3.3 m/s in pursuit. We wish to find how much time elapses before the officer catches the car. (a) Identify the initial states when the car passes the police. (b) Define the final state or conditions which enable...
3. A car is traveling at 55 MPH? a) What does it mean to say that this car is traveling at 55 MPH? b) How many miles the car will cover in 120 minutes? 4. You are driving at 18 m/s, and a cat runs out in front of your car. You stop rani which takes 3 seconds, and miss the cat. What is your deceleration? 5. A car traveling in a straight line with an initial velocity of 10...
Name 37) You have been hired as an expert witness in a crash investigation. Car A of mass 1900 kg crashed into stationary car B of mass 1000 kg. You measure the coefficient of kinetic friction between the locked tires a was in park so the tires did not turn). Car A hits car B, locking bumpers so that they s bef nd the road to be 0.6 (car B kid off together. They skid 20 m ore coming to...
0 to 60 mph in 10 seconds with the A car accelerates smoothly from velocity given in the figure below. Estimate how far the car travels during the 10 -second period. v (mph) 60 40 20 t (sec) 10 5 Round your answer to three decimal places. miles. The car traveled
0 to 60 mph in 10 seconds with the A car accelerates smoothly from velocity given in the figure below. Estimate how far the car travels during the 10...
Please show work
3. A car traveling at a constant 39 m/s (-87 mph) passes a police car that is initially traveling at 25 m/s (55 mph). At the instant of the pass, the police car accelerates at a constant rate of 3.3 m/s in pursuit. We wish to find how much time elapses before the officer catches the car. (a) Identify the initial states when the car passes the police. (b) Define the final state or conditions which enable...
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