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Chapter 2: Q10. (page 43)

Every year, the earth travels about 109km as it orbits the sun. What is the earth鈥檚 average speed in km/h?

Short Answer

Expert verified

The earth鈥檚 average speed is 1.14脳105kmh.

Step by step solution

01

Step 1. Calculation of the total hours in one year

The earth鈥檚 orbit is a two-dimensional plane in which it rotates around the sun. The earth takes 365 days to complete one complete cycle in its orbit.

Given data.

The traveled distance of the earth in a year is 109km.

Now, you know that there are 365 days in a year and 24 hours in a day. Then,

1year=365day=365day脳24hour1day=8760hour

02

Step 2. Calculation of average speed

Now, you know that

Averagespeed=TotaldistanceTotaltime=109km8760h=1.14脳105kmh

Therefore, the earth鈥檚 average speed is 1.4脳105kmh.

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Most popular questions from this chapter

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.83 s after passing his window. Roger鈥檚 room is on the third floor, 15 m above the sidewalk. (a) How fast are the balloons traveling when they pass Roger鈥檚 window? (b) Assuming the balloons are being released from rest, from what floor are they being released? Each floor of the dorm is 5.0 m high.

A driver is traveling at 18.0 m/s when she sees a red light ahead. Her car is capable of decelerating at a rate of 3.65 m/s2. If it takes her 0.350 s to get the brakes on, and she is 20.0 m from the intersection when she sees the light, will she be able to stop in time? How far from the beginning of the intersection will she be, and in what direction?

You travel from point A to point B in a car moving at a constant speed of 70km/h. Then you travel the same distance from point B to another point C, moving at a constant speed of 90km/h. Is your average speed for the entire trip from A to C, equal to 80km/h? Explain why or why not.

While coming to a stop, a car leaves a skid mark of 65 m in length on the highway. Assuming a deceleration of 4.00 m/s2, estimate the speed of the car just before pushing the brake.

Question: A ball is thrown straight up. What are the velocity and acceleration of the ball at the highest point in its path?

(a) v=0,a=0.

(b) v=0,a=9.8m/s2up.

(c) v=0,a=9.8m/s2down.

(d) v=9.8m/sup,a=0.

(e) v=9.8m/sdown,a=0.
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