For an object traveling with a constant velocity, which of the following is correct:Select one:O Average and instantaneous velocity are equal to zeroO None of the offered choices fitsO Average and instantaneous velocity are the sameO Average velocity is greater than instantaneous velocityO Instantaneous velocity is greater than average velocityWhat is true about instantaneous velocity in this experiment?Select one:O Instantaneous velocity is always zero as the position increasesO Instantaneous velocity is increasing as the position increasesO None of the offered choices fitsO Instantaneous velocity is decreasing as the position increasesO Instantaneous velocity is constant as the position increasesClear my choiceWhen studying the average velocity of the object, during its motion the object can:Select one:O decelerate.O move at a constant speed.O accelerate.O all of the mentioned options.O come to a complete stop.Photogates are timing devices that measure time of the changes in state of an infrared beam that is blocked by a flag of known length.Select one:O TrueO FalseAs we increase the position where we measure instantaneous velocity, its value does not change because the glider does not experience an acceleration.Select one:O TrueO False

"Since you have asked multiple questions, as per Bartleby instructions, we will solve the first…

For an object traveling with a constant velocity, which of the following is correct: Select one: O Average and instantaneous velocity are equal to zero O None of the offered choices fits O Average and instantaneous velocity are the same O Average velocity is greater than instantaneous velocity O Instantaneous velocity is greater than average velocity What is true about instantaneous velocity in this experiment? Select one: O Instantaneous velocity is always zero as the position increases Instantaneous velocity is increasing as the position increases O None of the offered choices fits

For an object traveling with a constant velocity, which of the following is correct: Select one: O Average and instantaneous velocity are equal to zero O None of the offered choices fits O Average and instantaneous velocity are the same O Average velocity is greater than instantaneous velocity O Instantaneous velocity is greater than average velocity What is true about instantaneous velocity in this experiment? Select one: O Instantaneous velocity is always zero as the position increases Instantaneous velocity is increasing as the position increases O None of the offered choices fits

An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter2: Motion

Section: Chapter Questions

Problem 1AYK: Do highway speed limit signs refer to average speeds or to instantaneous speeds? Explain.

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You have exactly 5 minutes 20 seconds to get to your nextclass on time and that classroom is 448 m east of where youare right now. First you run to your dorm room at anaverage velocity of 5.02 m/s to the south to pick up yourcalculator and your dorm room is 461 m south of where youwere initially. What average velocity (magnitude only) doyou now need to run from your dorm room to yourclassroom to arrive exactly on time? 2.84 m/s 2.01 m/s 5.02 m/s 2.82 m/s
A ball with a mass of 50 g is traveling at 25 m/s bounced off a brick wall and rebounded at 20 m/s. If a high speed camera was able to record the event and that the ball is known to have been in contact with the wall for 3.50 ms, what is the magnitude of the average acceleration of the ball during this time interval?
Do highway speed limit signs refer to average speeds or to instantaneous speeds? Explain.
The brakes on your car can slow you at a rate of 5.2 m/s2. (a) If you are going 137 km/h and suddenly see a state trooper, what is the minimum time in which you can get your car under the 90 km/h speed limit? (The answer reveals the futility of braking to keep your high speed from being detected with a radar or laser gun.) (b) Graph x versus t and v versus t for such a slowing.
Assume you are driving a car at a constant speed of 76 km/h. Suddenly you see a deer standing on the highway and you must put on the brakes. Your reaction time (time elapsed between the moment you see the deer and your foot hitting the brakes) is 0.118 s. The brakes provide an acceleration with a magnitude of 4 m/s2, and a direction opposite the initial velocity. How do you find the total distance traveled?
A particle moves according to a law of motion s = f(t), t ≥ 0, where t is measured in seconds and s in feet. f(t) = t3 − 15t2 + 72t (a) Find the velocity at time t. v(t) = (b) What is the velocity after 5 s? v(5) = ft/s (c) When is the particle at rest? t = s (smaller value) t = s (larger value) (d) When is the particle moving in the positive direction? (Enter your answer in interval notation.) t (e) Find the total distance traveled during the first 8 s.ft(f) Find the acceleration at time t. a(t) = Find the acceleration after 5 s. a(5) = ft/s2 (g) Graph the position, velocity, and acceleration functions for the first 8 s. (h) When, for 0 ≤ t < ∞, is the particle speeding up? (Enter your answer in interval notation.) When, for 0 ≤ t < ∞, is it slowing down? (Enter your answer in interval notation.)
The acceleration of a vehicle takes the form du/dt = 1.2 -0.06u where u is the vehicle speed in m/sec. The vehicle is traveling at 14m/sec at time (To) Determine the following:1. Time at which the vehicle attains a speed of 20m/sec.2. Acceleration of the vehicle after 5 seconds3. Distance traveled by the vehicle when accelerated to a speed of 20 m/sec.
The acceleration of a vehicle takes the form du/dt = 1.2 -0.06uwhere u is the vehicle speed in m/sec. The vehicle is traveling at 14m/sec at time T0Determine the following:1. Time at which the vehicle attains a speed of 20m/sec.2. Acceleration of the vehicle after 5 seconds3. Distance traveled by the vehicle when accelerated to a speed of 20 m/sec.
A certain freely falling object, released from rest, requires 1.95 s to travel the last 39.5 m before it hits the ground. (a) Find the velocity of the object when it is 39.5 m above the ground. (Indicate the direction with the sign of your answer. Let the positive direction be upward.) The response you submitted has the wrong sign. m/s(b) Find the total distance the object travels during the fall.
The speed of a bullet as it travels down the barrel of arifle toward the opening is given by v ! (- 5.00 x10*7)t*2+(3.00 x10*5)t, where v is in meters per second and t is inseconds. The acceleration of the bullet just as it leaves thebarrel is zero. (a) Determine the acceleration and positionof the bullet as a function of time when the bullet is in thebarrel. (b) Determine the length of time the bullet is accelerated. (c) Find the speed at which the bullet leaves thebarrel. (d) What is the length of the barrel?
You're an investigator for the National Transportation Safety Board, examining a subway accident in which a train going at 90 km/hkm/h collided with a slower train traveling in the same direction at 24 km/hkm/h . Your job is to determine the relative speed of the collision, to help establish new crash standards. The faster train's "black box" shows that it began negatively accelerating at 2.1 m/s2m/s2 when it was 52 mm from the slower train, while the slower train continued at constant speed. What do you report ?
The average speed of a vehicle on a stretch of Route 134 between 6 A.M. and 10 A.M. on a typical weekday is approximated by the function f(t) = 30t − 60√t + 70 (0 ≤ t ≤ 4) where f (t) is measured in miles per hour, and t is measured in hours, with t = 0 corresponding to 6 A.M. At what time of the morning commute is the traffic moving at the slowest rate? _ A.M. What is the average speed of a vehicle at that time? _ mph