Question
Asked Oct 1, 2019

Imagine that a sprinter accelerates from rest to a maximum speed of 10.3 m/s in 1.8 s.

In what time interval will he finish the 100-m race if he keeps his speed constant at 10.3 m/s for the last part of the race?

What assumptions did you make?

check_circle

Expert Answer

Step 1

The acceleration of the object is,

V=2+at
(10.3)-(0)+a8)
a 5.72 m/s
help_outline

Image Transcriptionclose

V=2+at (10.3)-(0)+a8) a 5.72 m/s

fullscreen
Step 2

The travelled distance by the object is,

1
d ut at4
2
-o(6,72)0a
-[()(L8)
=9.27m
help_outline

Image Transcriptionclose

1 d ut at4 2 -o(6,72)0a -[()(L8) =9.27m

fullscreen
Step 3

Therefore, the required ...

t(L.8
r(1.8)(100)-(0,27)]
103
10.61 s
help_outline

Image Transcriptionclose

t(L.8 r(1.8)(100)-(0,27)] 103 10.61 s

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Physics

Kinematics

Related Physics Q&A

Find answers to questions asked by student like you

Show more Q&A add
question_answer

Q: A bullet exits the muzzle of a rifle at a velocity of 360 mps and hits the target bullseye at a hori...

A: The range is given by,

question_answer

Q: Shown is a space station with a circular rim that forms the space station's main corridor or passage...

A: Given the acceleration of the apple is 27 km/h2.The diameter of the space station is 210 m.

question_answer

Q: In 1992, a 14-kg meteorite struck a car in Peekskill, NY, leaving a 20-cm-deep dent in the trunk. If...

A: Let u be the initial velocity of meteorite, v be the final velocity, a be the acceleration, t be the...

question_answer

Q: A ball, released from rest, takes 4.00s to roll down a straight, 12.0m long, ramp(inclined plane). W...

A: Given,

question_answer

Q: Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades a...

A: a)Let the force and acceleration in east direction is taken as positive quantities and in west direc...

question_answer

Q: 1. Townsend 1.8: A helium-neon laser (-633 nm) used in a lecture demonstration of the double- slit e...

A: Write the expression for power emitted by the laser , and substitute 5mW for P, 633nm for λ, 3×108m/...

question_answer

Q: An 85-g arrow is gired from a bow whose string exerts an average force of 105 N on the arrow over a ...

A: Given,

question_answer

Q: Gradient Calculate the gradient Vf of the following functions: (a) f(z,2) = 2+ z2 (b) f(y) = ky, whe...

A: (a) Given that f(x,z)=x2+z3. Write the expression for gradient of the function.

question_answer

Q: A 300-kg wrecking ball swings at the end of a 25-m long cable. If at the bottom of the arc the cable...

A: Click to see the answer