True or False? 20 questions

Question 1 The moment of a force F about a pivot is F/d False - Fxd

Question 2 The centre of mass of an object is the point where its mass is spread out. False - concentrated

Question 3 A suspended object is in equilibrium when its centre of mass is directly beneath the point of suspension. True

Question 4 The centre of mass of a symmetrical object is off the axis of symmetry. False - on

Question 5 True - W 1 d 1 =W 2 d 2

Question 6 The stability of an object is decreased by making its base as wide as possible False - increased

Question 7 The stability of an object is increased by making its centre of mass as high as possible. True

Question 8 An object will topple over if the line of action of its weight is outside its base. True

Question 9 The greater the mass of an object the lower the centripetal force. False - greater

Question 10 The Centripetal force increases as the radius of the circle decreases. True

Question 11 Gravity is measured in Newtons. False – N/kg

Question 12 The force of gravity between two objects is an attractive force. True

Question 13 The greater the distance between two objects the greater the force of gravity. False - smaller

Question 14 The smaller two objects are the greater the force of gravity. False - smaller

Question 15 The larger an orbit is the longer the orbiting body takes to go round. True

Question 16 If the speed of a planet in orbit is too high it will spiral into the Sun. False – fly off into space

Question 17 If the speed of a planet in orbit is too low it will spiral into the Sun. True

Question 18 A Geostationary satellite orbits the earth in 20 hours. False – 24 hours

Question 19 Geostationary satellites are used for many purposes Including weather forecasting and police surveillance. False - communications

Question 20 Monitoring satellites are in much lower orbits than geostationary. True