Problem 2A bus driving down a long straight freeway has an initial velocity of8 m/s when it begins to accelerate at 2 m/s². How long does it take totravel 180 m? Don't forget units!

Answered: Problem 2 A bus driving down a long…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 47PE: (a) Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is...

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A baseball is hit almost straight up into the air with a speed of 24 m/sm/s . Part A Estimate how high it goes. Express your answer to three significant figures and include the appropriate units.
Question 4 E The velocity of a car in m s-l can be modeled as v(t) = 0.512 + 3t for 0
1 A car has acceleration of 1.20 m/s2 and starts from 2.50 m/s. What is its speed after 5.00 seconds, in m/s? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. 2 A car is traveling at 30 m/s ( The driver applies the brakes and the car comes to a stop in 4.0 s What is the car's acceleration, in m/s2? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
Problem 1 A cannon ball on the ground is fired at 35 with an initial velocity of 250 m/s. a. How long will it take to hit the ground? b. How far from the cannon ball will it hit the ground? c. Compute for maximum height to be reached by the cannon ball. Given: V. - 250 m/s 35 g- 9.8" Solution: a. The time of flight of the cannon ball 2v, sin 500m/s(sin 35°) 500m/s(0.57) _ 28Sm/s = 29.08s 9.8m/x 9.8m/s 9.8m/s b. The range of the cannon ball v, sin 0 (250m/s) 2 sin 35° 62500m2/s 2(0.57) 9.8m/s R 9.8m/ s 62.500m /s(0.9397) 58,730.79m /s? 9.8m/s 5,992.94m 9.8m/s c. The maximum height that the cannon ball reached v sin 0 (250m/s)²(sin 35")(sin35") 62.500m /s²(0.57) 2(9.8m/s) Утах 28 19.6m/s 62,500m² /s²(0.32899 20,561.87m /s- 1,049.08m 19.6m/s 19.6m/s This time, it's your turn to solve the next problem. Problem 2 An arrow is launched at a velocity of 20 m/s in a direction making an angle of 25° upward with the horizontal. 10 a. How long will it take to hit the ground? b. How far from the…
Acceleration a has the dimensions of length per time squared, speed v has the dimensions of length per time, and radius r has the dimension of length. Which of the following expressions may be correct? Explain your answer in each case. a. a = vr b. a = v/r c. a = v2/r d. a = v/r2
(a) A daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 32° ramp at a speed of 40.0 m/s (144 km/h). How many buses can he clear if the top of the takeoff ramp is at the same height as the bus tops and the buses are 20.0 m long? (b) Discuss what your answer implies about the margin of error in this act—that is, consider how much greater the range is than the horizontal distance he must travel to miss the end of the last bus. (Neglect air resistance.)
A motorist drives for 35.0 minutes at 85.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130. Km in 2.00 h. (a) What is his total displacement? (b) What is his average velocity?
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(a) Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.00 m/s. (b) How long would it take to reach the ground if it is thrown straight down with the same speed?

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Problem 2 A bus driving down a long straight freeway has an initial velocity of 8 m/s when it begins to accelerate at 2 m/s². How long does it take to travel 180 m? Don't forget units!