An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate, its speed if it takes 24 hours to revolve around the earth.

A satellite has mass m speed v and radius of circular orbit r. The force F acting on it is :

An artifucial satellite is orbiting around the earth with a speed of 4kms_-1 at a distance of 10^4 km from the earth. Calculate the centripetal acceleration.

An artificial satellite is at a height of 36,500 km above earth's surface. What is the work done by earth’s gravitational force in keeping it in its orbit?

A cyclist starts from the centre Oof a circular park of radius 1 km, reaches the edge Pof the park, then cycles along the circumference, and returns to the centre along QO as shown in Fig. 4.21. If the round trip takes 10 min, what is the (a) net displacement, (b) average velocity, and (c) average speed of the cyclist?

A train travels at a certain average speed for a distance of 63 km and then travels a distance of 72 km at an average speed of 6km/hour more than its original speed. lf it takes 3 hours to complete the total journey, what is its original average speed?

A LASER is a source- of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been already determined very precisely using a laser as a source 'of light. A laser light beamed at the Moon takes 2.56 s to return after reflection at the Moon’s surface. How much is the radius of the lunar orbit around the Earth?

A satellite orbits the earth at a height of 400 km above the surface. How much energy must be expended to rocket the satellite out of the earth’s gravitational influence? Mass of the satellite = 200 kg, mass of the earth = 6.0 xx10^24 kg, radius of the earth = 6.4 xx10^6 m, G = 6.67 x 10^-11 N m^2 kg ^-2 .

As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 xx 10^24 kg, radius = 6400 km

Two satellite of masses (m_1 and m_2 (m_1 > m_2) are revolving round the earth in circular orbit of radii r_1and r_2 (r_2 > r_2) respectively. Which of the following statements is true regarding their speeds v_1 and v_2