College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- An electron with an initial speed of 4.56x10^5m/s enters a linear particle accelerator that is3.50 cm long. In this section, the electron is accelerated to a final speed of 3.25x10^5m/s a) . Calculate the magnitude of the acceleration of the electron. b) Determine the time of accelerationarrow_forwardAn object's position in the as a function of time obeys the equation; x(t) = 14.2/t2.17 + 5.1t3 where all constants have proper SI Units. What is the speed of the object in the x direction at t = 1.93 seconds?arrow_forwardThe height of a helicopter above the ground is given by h = 3t^2+2.0t^4, where h is in meters and t is in seconds. At t=2.0s, the helicopter releases a small bag. a) Calculate the maximum height the bag reaches measured from the ground. b) How long after the bad is released, does it strike the ground? c) Calculate the speed of vag when it hits the ground.arrow_forward
- Near the end of a marathon race, the first two runners are separated by a distance of 45.6 m. The front runner has a velocity of 3.2 m/s, and the second a velocity of 4.95 m/s. a) What is the velocity of the second runner relative to the first, in meters per second? b) How many seconds earlier will the second runner reach the finish line if the front runner is 250 m from the finish line in seconds? c) What distance ahead, in meters, will the second runner be when she crosses the finish line? please answer all partsarrow_forwardYou are driving down the highway late one night at 20 m/s when a deer steps onto the road 40 m in front of you. Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your car is 12 m/s2. How much distance is between you and the deer when you come to a stop? distance: m What is the maximum speed you could have and still not hit the deer? maximum speed:arrow_forward1) The motions of a car and a motorbike along a straight road are described by the velocity vs time graph provided below. The two vehicles are initially alongside each other at time t=0 s. The motorbike’s speed is 18.1 m/s and the time T is 59.9 s. a) what distance has the motorbike travelled between 0 and T (in km)? b) What distance has the car traveled between 0 and T (in km)? 2) Which of these statements is true? a. At T, the car and motorbike are at the same location. b. the acceleration of the car is constant between 0 and T c. the acceleration of the motorbike is 0 d. the acceleration of the car is 0 3) a)What is the car's average speed for the first T seconds? (in m/s) b) What is the motorbike's average speed for the first T seconds (in m/s)arrow_forward
- 3. The position of a drone as a function of time is given by m m *(t) = ( 8 i – 5 j+ 1.5 k) m + (-2 î + 4 j) t - t2j a. What is the x-position of the drone as a function of time? b. What is the y-position of the drone as a function of time? c. How far away is the drone from its starting position at t = 3s? What is the acceleration vector? e. What is the velocity vector as a function of time? f. At what time is the speed equal to 4 m/s?arrow_forwardA cyclist rides down a long straight road at a velocity (in m/min) given by v(t) = 400 - 20t, for 0≤t≤ 10. a. How far does the cyclist travel in the first 3 min? b. How far does the cyclist travel in the first 10 min? c. How far has the cyclist traveled when his velocity is 350 m/min?arrow_forwardQ:A fires a rocket beside from rest at an angle 30° and accelerates at 30 m/s2 for 3.0 s. The engine shuts off at a height 202.5 m above the ground. a) Calculate the speed of the rocket after 3s. reached? b) At what time after t = 0 will the maximum height c) What maximum height will the rocket reacharrow_forward
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