Question 10 of 20 -15E View Policies Next question Current Attempt in Progress To answer this question, first click here to view the associated video. Two cars are identical except for the tread design on their tires. They both enter an unbanked horizontal curve at the same speed. Car A cannot negotiate the turn lit slides offl, but Car B can. Which tread design, the one on Car A, or the one on Car B. yields the larger coefficient of static friction between the tires and the road? D Car B D Cannot be determined from the given information. O Car A Consider two identical frictionless and banked curves - one is located on the earth, and the other is on the moon. If identical cars are to travel around each curve along a circle of the same radius, how must the speeds of the two cars compare? The speeds of the two cars must be the same. The speed of the car on the earth must be greater than the speed of the car on the moon. O The speed of the car on the moon must be greater than the speed of the car on the earth. Question 12 of 20 - /5 E View Policies Current Attempt in Progress An indoor track is to be designed such that each end is a banked semi-circle with a radius of 24 m. What should the banking angle be for a person running at speed v = 6.0 m/s? 0 87 0 22 0 11 0 14 0 45Question 13 of 20 - /5E View Policies Current Attempt in Progress To answer this question, first click here to view the associated video. A satellite is in a circular orbit around a planet. A second satellite is placed in a different circular orbit that is farther away from the same planet. How do the speeds of the two satellites compare? O The speed of the second satellite is greater than the speed of the first satellite. The speed of the second satellite is less than the speed of the first satellite. O The speeds of the two satellites are equal. Which of the following statements is correct concerning satellites in orbit around the same planet? O The period of a satellite depends on its mass. Q Satellites located closer to the planet have longer periods, The period of a satellite is independent of the planet's mass. O If the orbital radius of a satellite doubles, then its period increases by a factor of 4. O None of the above statements are correct. Question 14 of 20 1 View Policies Current Attempt in Progress A satellite is placed in orbit 9.37 x 10" m above the surface of Jupiter. Jupiter has a mass of 1.90 x 10" kg and a radius of 7.14 x 10' m. Find the orbital speed of the satellite. Number Units Question 15 of 20 -15E View Policies Current Attempt in Progress Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 39.6 kiv's and 55.9 km/'s. The slower planet's orbital period is 8.61 years. (a] What is the mass of the star? (b) What is the orbital period of the faster planet, in years? (a] Number Units (b) Number UnitsQuestion 16 of 20 /5 View Policies Current Attempt in Progress A 2400 kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 4670 m/'s. satellite planet The radius of the circular orbit is 8.92 - 104 m Determine the magnitude of the gravitational force exerted on the satellite by the planet. This cannot be determined since the mass and radius of the planet are not specified. 0 50= 10 'N # 24 x 10'N 0 75 - 10 4N Question 17 of 20 View Policies Current Attempt in Progress The drawing shows an extreme skier at bottom of a ski jump. At this point the track is circular with a radius . Twoforces act on the skier, her weight my and the normal force F. Which relation describes how the net force acting on her is related to her mass mand speed vand to the radius? Assume that "up' is the positive direction. MUZ F Fy + ME = - ME = Question 19 of 20 View Policies Next question Current Attempt in Progress The record for the highest speed achieved in a laboratory for a uniformly rotating object was 2.01 x 10 m/'s for a 0.15-m long carbon rod, What was the period of rotation of the rod? 0 47 = 10#5 0 52 x 10-3 s 0 13 = 105 0 74 = 10's 0 31 x 10'sAnnesiam 19 of 20 - /5 E : Next question View Policies Current Attempt in Progress A rocket orbits a planet in a circular orbit at a constant speed as shown in the drawing. 10 Note these arrows: At the instant shown in the drawing, which arrow indicates the direction of the acceleration of the rocket? 02 03 05 0 4 Question 20 of 20