Question

a satellite in circular orbit around the earth moves at constant speed. The orbit is maintained...

a satellite in circular orbit around the earth moves at constant speed.

The orbit is maintained by the force of gravity between the Earth and satellite, yet no work is done on the satellite. how is this possible?
A. no work is done if there is no contract between objects.
b.no work is done if done if the direction of motion is parallel to the force.
c. no work is done if the direction of motion is perpendicular to the force.
d. no work is done because there is no gravity in space.

2. what is the magnitude of the momentum of a 40-g bird flying with a speed of 6.5 m/?
a. 260 kg.m/s
b. 4 kg.m/s
c. 0.24 kg.m/s
d. 0.26 kg.m/s


Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

In this question we have to determine the workdone by gravitational force on a satelite moving in a circular orbit.

In 2nd part we have to find the magnitude of momentum of a bird.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A truck is traveling horizontally to the right (Fig. 4–38). When the truck starts to slow...
A truck is traveling horizontally to the right (Fig. 4–38). When the truck starts to slow down, the crate on the (frictionless) truck bed starts to slide. In what direction could the net force be on the crate? (a)       No direction. The net force is zero. (b)       Straight down (because of gravity). (c)        Straight up (the normal force). (d)       Horizontal and to the right. (e)        Horizontal and to the left. A satellite in circular orbit around the Earth moves at...
A satellite in a circular orbit around the earth with a radius 1.019 times the mean...
A satellite in a circular orbit around the earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment (m = 69.0 kg) is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ground. Its speed just before it hits the ground is 367.0 m/s. a)Find the total work done by gravity on the satellite fragment. RE 6.37·103 km;...
A satellite in a circular orbit around the earth with a radius 1.019 times the mean...
A satellite in a circular orbit around the earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment (m = 95.0 kg) is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ground. Its speed just before it hits the ground is 375.0 m/s. (1)  Find the total work done by gravity on the satellite fragment. RE 6.37·103 km;...
A satellite is in a circular orbit around the Earth at an altitude of 1.66 106...
A satellite is in a circular orbit around the Earth at an altitude of 1.66 106 m. (a) Find the period of the orbit (in hrs). (Hint: Modify Kepler's third law: T2 = (4π2/GMS)r3 so it is suitable for objects orbiting the Earth rather than the Sun. The radius of the Earth is 6.38 106 m, and the mass of the Earth is 5.98 1024 kg.) (b) Find the speed of the satellite (in km/s). (c) Find the acceleration of...
A satellite is in a circular orbit around the Earth at an altitude of 3.84  106 m....
A satellite is in a circular orbit around the Earth at an altitude of 3.84  106 m. (a) Find the period of the orbit. (Hint: Modify Kepler's third law so it is suitable for objects orbiting the Earth rather than the Sun. The radius of the Earth is 6.38  106 m, and the mass of the Earth is 5.98  1024 kg.) h (b) Find the speed of the satellite. km/s (c) Find the acceleration of the satellite. m/s2 toward the center of the...
A satellite moves in a circular orbit around the Earth. If the mass of the satellite...
A satellite moves in a circular orbit around the Earth. If the mass of the satellite increased four times, how will its orbiting speed be affected? a. the orbiting speed will quadruple b. the orbiting speed will decrease too half c. the orbiting speed will double d. none of the given answers is correct e. the orbiting speed will not be affected
An Earth satellite is in a circular orbit at an altitude of 500 km. Explain why...
An Earth satellite is in a circular orbit at an altitude of 500 km. Explain why the work done by the gravitational force acting on the satellite is zero. Using the work-energy theorem, what can you say about the speed of the satellite?
A 1000-kg satellite in circular orbit around the Earth is moving at a speed of 7
A 1000-kg satellite in circular orbit around the Earth is moving at a speed of 7
Consider a satellite of mass m in a circular orbit of radius r around the Earth...
Consider a satellite of mass m in a circular orbit of radius r around the Earth of mass ME and radius RE. 1. What is the gravitational force (magnitude and direction) on the satellite from Earth? 2. If we define g(r) to be the force of gravity on a mass m at a radial distance r from the center of the Earth, divided by the mass m, then evaluate the ratio g(r)/g(RE)to see how g varies with radial distance. If...
A satellite of mass 350 kg is in a circular orbit around the Earth at an...
A satellite of mass 350 kg is in a circular orbit around the Earth at an altitude equal to the Earth's mean radius. (a) Find the satellite's orbital speed. m/s (b) What is the period of its revolution? min (c) Calculate the gravitational force acting on it. N
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT