(II) A sports car accelerates approximately as shown in the velocity-time graph of Fig. 2–43. (The short flat spots in the curve represent manual shifting of the gears.) Estimate the car's average acceleration in (a) second gear and (b) fourth gear. 50 5th gear 4th gear 40 3rd gear 30 20 2nd gear 10 1st gear t (s) 0. 10 20 30 40 FIGURE 2–43 Problem 56. The velocity of a car as a function of time, starting from a dead stop. The flat spots in the curve represent gear shifts. (s/u)a

Q: one stone falls from a cliff, a second one is thrown 3 seconds later, and they both hit the ground…

A: The first stone is dropped from the rest and the second stone with an initial velocity of 58.8 m/s,…

Q: A Piper Cub is a small airplane that must achieve a speed of 20 m/s for takeoff. If it starts from…

A: Given data:   Initial velocity (u) = 0 msFinal velocity (v) = 20 ms  Distance (d) = 1.0 km = 1000…

Q: Take the slope of the curve  to find thejogger’s velocity at t = 2.5 s . (b) Repeat at 7.5 s.…

A: From the graph, calculate the jogger’s velocity at t=2.5 s. The slope is linear between the 0 to 18…

Q: During the 1988 Winter Olympics in Calgary, Alberta the brakeman of a two-man bobsled team slows the…

A: Given data:  Initial velocity (u) = 24.8 m/s Final velocity (v) = 12.2 m/s Time (t) = 1.4 s…

Q: If x is in meters and t is in seconds, what are the units of A and B? (b) If the rocket starts from…

A:

Q: (30) A motorist is driving at 15m when she sees that a traffic light 315 m ahead has just turned…

A: Given: motorist driving at 15 m/s Traffic light 315m ahead the light stays red for 25s

Q: Even when moving around a corner, there is no acceleration as long as the object has a constant…

A: The given statement says that there is no acceleration as long as the object has a constant speed,…

Q: The head of a rattlesnake can accelerate at 55 m/s² in striking a victim. If a car could do as well,…

A: The head of a rattlesnake can accelerate at a=55 m/s2 in striking a victim. If a car could do as…

Q: vx(t) = (a + 23t³ - 3yt5+48t7-6εt), a, ß, y, 6, and e are just constants. (A) Determine an…

A:

Q: (a) maximum speed (in m/s),    (b) the maximum acceleration (in m/s2 )   (c) the total…

A:

Q: II. The car starts from rest at s = 0 and increases its speed at at = 4 m/,2. Determine the time…

A: When an object moves in a circular path, it has two components of its velocity and acceleration- one…

Q: A student is running at her top speed of 5 to catch a bus, which is stopped at the bus stop. When…

A: The

Q: 13) Calculate the acceleration of a person who can reach a speed of 9.2 m/s in a time of 3.6 seconds…

A: Given : Initial velocity (u) is 0 m/s as the person starts from rest Final velocity is 9.2 m/s and…

Q: 68: The maximum braking acceleration of a car on a dry road is about 8.0 m/s². If two cars move…

A:

Q: Now suppose that at the end of its trip, the train  slows to a stop from a speed of 30.0 km/h in…

A: Given: initial velocity, u = 30 km/h = 8.33 m/s  final velocity, v = 0 m/s  time, t = 8 s

Q: Two narrow slits in a thin metal sheet are 2.70 mm apart center-to-center. When illuminated directly…

A:

Q: When travelling in a straight line in constant acceleration from 0km/h to 50km/h after already…

A:

Q: 9. A student took 15 minutes to cycle from his house to school. He starts from rest and reaches a…

A: Motion can be uniform or accelerated. Attributes like velocity, displacement, etc define motion. We…

Q: The speed of the object traveling straight is v=3t^2-12t-15, and the speed is in ft/s Please find…

A: i) When t=0 v=3t2-12t-15 If t=0 s v=-15 ft/s  distance=0 ft position s=40 ii) When t=3 v=3…

Q: (II) A sports car accelerates approximately as shown in the velocity-time graph of Fig. 2-43. (The…

A: We are given the velocity time curve. The short flat part is the gears being shifted. The average…

Q: Can an object have a positive acceleration, while maintaining a constant velocity?

A:

Q: 7. (II) You are driving home from school steadily at 95 km/h for 180 km. It then begins to rain and…

A: CONCEPT: We know,           Speed = distance/ time                  v = s/t Where 's' is the…

Q: - Problem 5: A rock is thrown straight down from the Verrazano Narrows Bridge in New York City with…

A: Given  Initial velocity u = -14.5 m/s  Acceleration due to gravity g = - 9.8 m /s2  Negative because…

Q: car traveling 85 km/h slows down at a constant 0.5m / (s ^ 2) just by "letting up on the gas"…

A: Given value--- initial speed = 85 km/h  slows down at a constant 0.5m / (s ^ 2). We have to…

Q: If a speedometer of a car reads 40 km/he, does the car have constant velocity?

A: The velocity is a vector quantity. It has the speed with a direction.

Q: Two soccer players start from rest, 44 m apart. They run directly toward each other, both players…

A: Two players running towards each other.The initial distance between the players is Both start from…