Week 4 Fall 2019 Problem 2.81 11 of 13 Review Constants A sprinter can accelerate with constant acceleration for 2.00 s before reaching top speed. He can run the 100-meter dash in 10 s. Part A What is his speed as he crosses the finish line? VA m/s Request Answer Submit Provide Feedback Next

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Q: A hoodlum throws a stone vertically downward with an initial speed of 18.0 m/s from the roof of a…

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Q: A speeding motorcyclist is traveling at a constant speed of 36.0 m/s when he passes a police car…

A: a) The expression for time is t=va Substitute values in the above equation t=36.0ms4.0ms2=9 s

Q: 300 200 100 t(s) 10 20 30 40 50 60 -100 -200 (u)p

A: distance moved in first 10 seconds = 200 m distance moved in 10 to 20 seconds = 0 m distance moved…

Q: A hoodlum throws a stone vertically downward with an initial speed of 11.0 m/s from the roof of a…

A: Given data: Initial speed, u=-11 m/s (-ve sign indicates the stone is travelling downwards) Height…

Q: 2. A car starts from rest and accelerates to 8 m.s in 5 seconds. It maintains its speed for 2…

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Q: Question 4 At the starting gun, a runner accelerates at 1.7 m/s? for 4.8 s . The runner's…

A: The equations of kinematics are given as, 1. v = u + at  2. s = ut +12at23. v2 = u2 + 2as  Where u…

Q: 2. (I) Accelerating from rest, a top fuel race car can reach 333.2 mph (=148.9 m/s) at the end of a…

A: (2) Write the given values with suitable variables. u=0 m/sv=148.9 m/sd=402.3 m Here, u denotes the…

Q: Directions: It is a Problem-Solving test, thus, you need to show your solutions in solving the…

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Q: Homework: A motorist with an expired license tag is traveling at 10.0 m's down a street, and a…

A: Speed of motorist , V1 = 10 m/s Acceleration of the police , a = 2 m/s2  To find = a) Time required…

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Q: 1.Merry's house is 55 km away from her cousin's house. How long will it take for Merry to go to her…

A: Given :  Distance (d) = 55 km Speed (v) = 32 km/h Unknown: Time (t)

Q: A car traveling 56.0 km/h is 24.0 m from a barrier when the driver slams on the brakes.The car hits…

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Q: You are driving through town at 10.0 m/s when suddenly a ball rolls out in front of you. You apply…

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Q: 2. A bike rider pedals with constant acceleration to reach a velocity of 7.5 m/s over a time of 4.5…

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Q: 3. A fighter jet has a liftoff speed of 286 mph. what minimum constant acceleration does this…

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Q: The Bugatti Veyron can go from 0-100km/h in 2.46s. It takes another 7.34s at a different…

A: Given The initial velocity is u=0. The velocity in t1 = 2.46 s is v1=100 km/h=100×1000 m3600 s=…

Q: 1. The fastest measured pitched baseballleft the pitcher’s hand at a speed of 45.0 m/s. If the…

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Q: 1. A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed…

A: The friend is moving at a constant velocity of 4 m/s.So, after 3 seconds,x2 = u2 × t1x2 = 4 × 3x2 =…

Q: 12 A paratrooper is initially falling downward at a speed of 30.0 m/s before her parachute opens.…

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Q: A blue car travels down a straight road at a constant speed of 18.9 m/s. As they pass a red car,…

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Q: 1) A car is accelerating uniformly as it passes two checkpoints that are 30 m apart. The time taken…

A: Given value--- distance between checkpoints = 30 m. time taken = 4 sec. initial speed =5 m/sec .…

Q: 1. A car moving with constant acceleration covers the distance between two points 58.0 m apart in…

A: Given data, Displacement between the points = 58 m time taken = 6.2 sec speed at second point = 15…

Q: 5) A rugby ball on Mars, where the acceleration due to gravity is 0.379g and air resistance is…

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Q: *85. D mmh A police car is traveling at a velocity of 18.0 m/s due north, when a car zooms by at a…

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Q: 1. A usual football tryout involves a player running a 40-yard dash. If a particular player finishes…

A: We have givenDistance travelled (D)=40 yardTime (t)=4.25 sMaximum speed at first 16 yard distance…

Q: 2. A rocket launches upwards with initial velocity 50.0 m/s and constant acceleration of 2.0m/s?…

A: a). After the engine stops, the motion of the rocket can be considered as the motion of the freely…

Q: 1. A police car at rest is passed by a car travelling at 120 km/h. Three seconds after the car…

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Q: 3. An automobile starting from rest speeds up to 12 m/s with a constant acceleration of 1.2 m/s.…

A: For the acceleration and deceleration calculate the  Total time   and also draw the v-t and s-t…

Q: 1. A usual football tryout involves a player running a 40-yard dash. If a particular player finishes…

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Q: 79. D mmh A cheetah is hunting. Its prey runs for 3.0 s at a constant velocity of +9.0 m/s. Starting…

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Q: 2a. A worker on a rooftop is startled by a snake, scoops it with a shovel and throws it down the…

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Q: A car traveling 59.4 km/h is 23.6 m from a barrier when the driver slams on the brakes. The car hits…

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Q: 3. A motorist traveling with constant velocity of 15 passes a school-crossing corner, where the…

A: The motorist is initially travelling at a constant velocity of 15 m/s. As soon as the motorist…