An old phrase used to sell cars was that they could "stop on a dime," meaning they could stop before the car moved a distance equal to the diameter of a dime. a. To see if this is realistic, calculate the net force needed to stop a 490-kg car moving at 25 miles/hour in a distance of 1.8 cm (the diameter of a dime). b. Compare that force to the weight of the car. Are they even close to the same size? Based on your comparison, is "stopping on a dime" a reasonable claim, or is the force needed unreasonably large? c. Calculate how much time it would take the car to stop. Is this a reasonable time for a car moving at 25 mph to stop, based on your experience traveling in cars?

An old phrase used to sell cars was that they could "stop on a dime," meaning they could stop before the car moved a distance equal to the diameter of a dime. a. To see if this is realistic, calculate the net force needed to stop a 490-kg car moving at 25 miles/hour in a distance of 1.8 cm (the diameter of a dime). b. Compare that force to the weight of the car. Are they even close to the same size? Based on your comparison, is "stopping on a dime" a reasonable claim, or is the force needed unreasonably large? c. Calculate how much time it would take the car to stop. Is this a reasonable time for a car moving at 25 mph to stop, based on your experience traveling in cars?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

On a separate occasion, Michael threatened to jump from the roof of hisoffice building as a demonstration of seasonal depression. If it takes 1.2seconds for his body to plummet to the ground,a. How fast will he be going when he reaches the ground?b. How far will he have fallen in meters?c. In feet?d. If Michael weighs 185 lbs, what would his force of collision with theground be, in Newtons, if his sudden deceleration upon impact takes0.1 seconds? ( 1 lb = 4.45 N, which means on Earth, a weight of 2.2lbs corresponds to a mass of 1 kg)
It takes the elevator in a skyscraper 4.0 s to reach its cruising speed of 10 m/s. A 60 kg passenger gets aboard on the ground floor. What is the passenger’s apparent weighta. Before the elevator starts moving?b. While the elevator is speeding up?c. After the elevator reaches its cruising speed?
A weight of 100 N is suspended by a rope from a ceiling. A horizontal force pulls the weight until the rope makes an angle of 70° with the ceiling. a. Construct a Free-Body Diagram.b. Solve for the horizontal force pulling the weight.c. Solve for the vertical component of tension.d. Solve for the tension in the rope.
mass. You place the mass on the ramp at an angle high enough that the mass starts sliding. You measure the time it takes to fall down a known distance, The time it takes to fall down the 45 degree ramp You have devised an experìment to measure the kinetic coefficient of friction between a ramp and a starting from a standstill is At = 0.55 sec, m-1 kg, and the distance it falls, Az, is 0.5 m. What is ? 7. Ax in At Ug
A rock has a mass of 17 kg on a planet. The acceleration due to gravity (g) on the planet is 7m/s^2.. Assuming the rock does not physically change, how much mass will it have on Earth? Choose one correct answer with correct unit of measure. A. 116.6 kg B. 17 kg C. 119 pounds D. 17 N
Ms. Estes is trying to assess which of her Physics students best comprehend the concepts of mass and weight. Which students offer the most accurate descriptions of mass and weight? Albert: Weight is a measurement of the force of gravity acting on an object.Catherine: Weight is a measurement of how many atoms are contained in an object.Evelyn: Weight is a measurement of how strong the Earth pushes upward on an objectBetty: Mass is a measurement of how much space an object takes up.Delilah: Mass is a measurement of how much matter an object has and of its inertia.Francis: Mass is a measurement that explains why all objects accelerate at -9.8 m/s2.
Mr. Vollmayer pulls his children (21kg and 24kg) on a sled (5kg). The force of friction on the sled is 60N and he pulls horizontally with 65N. a. What is the normal force on the sled?b. What is the acceleration of the sled?c. How fast will they be moving in 60s if they started from rest?d. How far will they go in this time?
A bus driver is driving at 25 mph and has to make an emergency stop by slamming on the bus's brakes. Later, he slams on the breaks again, but this time he is driving at 50 mph. How far will the bus skid compared to the first time? A. The stopping distance stays the same. А. B. The stopping distance is tripled. В. C. The stopping distance is quadrupled. D. The mass of the bus is required. E. The stopping distance is doubled.
Answer 6 to 10 6. How much force must be applied in order for a 1200 kg car to maintain a velocity of 4 m/s in a frictionless road? A.0 N B.300 N C.4800 N D.4 N 7. Which of the following concepts indicate that an object has been subjected to an unbalanced force? A.The object speeds up. B.The object slows down. C.The object changes direction. D.All of the above 8. How will you describe a rock sitting on a table? A.A velocity of 0 m/s B.An acceleration of 0 m/s/s C.Balanced forces acting on it D.All of the above 9. What will happen after collision of Boat X loaded with a total mass greater that of Boat Y which have both lost control and facing each other? A.Boat X will move faster than Y B.Boat X and Y will move with same speed C.Only boat X will move D.Boat X will move slower than Y 10. What happens with the thrown ball while floating in outer space? A.Goes nowhere, floats in space B.Slows down and stops after being…
If 1-kg of oatmeal weighs 10 N on the Earth’s surface, what can be said aboutthe weight of 1-kg of cotton?a. One kilogram of cotton weighs about 10 N on the earth’s surface.b. One kilogram of cotton weighs one-sixth that of the oatmeal on theearth’s surface.c. One kilogram of cotton weighs half the weight of the oatmeal.d. One kilogram of cotton weighs twice that of the oatmeal.
What does "the acceleration is the manifestation of the force" means? a. We know that the existence of an influence, a force, will make an object move and accelerate. b. The force is powerful, as it can influence acceleration in a lot of ways. c. The force is an entity that is being manifested by acceleration. d. When there is acceleration, a force is there to remove it.
B. Calculate the net force acting on the rocket during the launch process if the mass of the rocket is 25 g and the approximate launch time is 0.14 seconds. C. Explain how you could calculate the launch force acting on the rocket but what would you have to ignore and why? DATA FOR B IS IN IMAGE