U1 An object moving in a circular path of radius 40 cm completes two revolutions in 4s. Which of the following is an accurate calculation concerning the object's motion? A Its total angular displäcement was 2n radians. B Its average angular velocity was n rad s. C Its average linear velocity was 2.5ms. D Its frequency was 2 Hz. Q3 There is a place between the Earth and the Moon where the gravitational field strength is zero. This is because: A The Earth's gravitational field is stronger than the Moon's gravitational field. B Gravitational fields only exist close to the surfaces of planets and moons. C The fields from the Eartli and the Moon act in opposite Q2 A small rubber ball on a length of thin cotton was spun faster and faster in a nearly horizontal circle until the cotton broke. Which of the following describes this situation? A Tension in the string provides the centripetal force on the ball. B When the cotton broke the ball initially moved radially away from the centre of the circle. C If the experiment was repeated with a more massive ball moving in a path of the same radius, it would need to be spun faster before the cotton would break. directions. D The Moon does not have a gravitational field. Q4 Two satellites, P and Q, hi ve been placed in circular orbits around the Earth. The time period of satellite P is 2 hours and the time period of satellite Q is 16 hours. Which of the following is the correct ratio of radius of orbit of satellite Q to radius of orbit of satellite P? A 64 В 16 D If the experiment was repeated with the original ball moving in a path of larger radius, it would need to be spun faster С4 D 2 before tho

U1 An object moving in a circular path of radius 40 cm completes two revolutions in 4s. Which of the following is an accurate calculation concerning the object's motion? A Its total angular displäcement was 2n radians. B Its average angular velocity was n rad s. C Its average linear velocity was 2.5ms. D Its frequency was 2 Hz. Q3 There is a place between the Earth and the Moon where the gravitational field strength is zero. This is because: A The Earth's gravitational field is stronger than the Moon's gravitational field. B Gravitational fields only exist close to the surfaces of planets and moons. C The fields from the Eartli and the Moon act in opposite Q2 A small rubber ball on a length of thin cotton was spun faster and faster in a nearly horizontal circle until the cotton broke. Which of the following describes this situation? A Tension in the string provides the centripetal force on the ball. B When the cotton broke the ball initially moved radially away from the centre of the circle. C If the experiment was repeated with a more massive ball moving in a path of the same radius, it would need to be spun faster before the cotton would break. directions. D The Moon does not have a gravitational field. Q4 Two satellites, P and Q, hi ve been placed in circular orbits around the Earth. The time period of satellite P is 2 hours and the time period of satellite Q is 16 hours. Which of the following is the correct ratio of radius of orbit of satellite Q to radius of orbit of satellite P? A 64 В 16 D If the experiment was repeated with the original ball moving in a path of larger radius, it would need to be spun faster С4 D 2 before tho