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Chapter 2: Q. 2 (page 58)

For Questions 1 through 3, interpret the position graph given in each

figure by writing a very short 鈥渟tory鈥� of what is happening. Be creative!

Have characters and situations! Simply saying that 鈥渁 car moves

100 meters to the right鈥� doesn鈥檛 qualify as a story. Your stories should

make specific reference to information you obtain from the graph, such

as distance moved or time elapsed.

Short Answer

Expert verified

A body has started from rest and moving with a motion having non-uniform acceleration.

Step by step solution

01

Define non-uniform acceleration

When a body is not moving equal distance in equal instance of time then it is said to be in non-uniform acceleration.

02

Story creation

A rider is riding his bike with an increasing acceleration such that in first 4seche moves 20mstarting from rest. After another 4seche moves 60 m . The bike rider covered 100min 10 s , after starting his journey. The average velocity of the rider increases from 5 m/s to 10 m/s.

03

Diagrammatic representation

Position-time graph of the above mentioned problem is shown here:

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Most popular questions from this chapter

A ball rolls along the smooth track shown in FIGURE P2.43. Each segment of the track is straight, and the ball passes smoothly from one segment to the next without changing speed or leaving the track. Draw three vertically stacked graphs showing position, velocity, and acceleration versus time. Each graph should have the same time axis, and the proportions of the graph should be qualitatively correct. Assume that the ball has enough speed to reach the top.

Santa loses his footing and slides down a frictionless, snowy roof that is tilted at an angle of 30掳. If Santa slides 10 m before reaching the edge, what is his speed as he leaves the roof?

A jet plane is cruising at 300 m/s when suddenly the pilot turns the engines up to full throttle. After traveling 4.0 km, the jet is moving at a speed of 400 m/s. What is the jet鈥檚 acceleration, assuming it to be a constant acceleration?

A small child gives a plastic frog a big push at the bottom of a slippery 2.0-m-long, 1.0-m-high ramp, starting it with a speed of 5.0 m/s. What is the frog鈥檚 speed as it flies off the top of the ramp?

A ball is thrown straight up into the air. At each of the following

instants, is the magnitude of the ball鈥檚 acceleration greater than g,

equal to g, less than g, or 0? Explain.

a. Just after leaving your hand.

b. At the very top (maximum height).

c. Just before hitting the ground.
See all solutions

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