Practice 10 questions on PHY101 - O Level Topical Physics at O Level Topical Physics. Free AI-generated quiz on uNotes — track your score, retake anytime.
1According to the principle of conservation of energy, which of the following statements is true?
2A swimmer with a mass of 60 kg is moving at a steady speed of 0.80 m/s. Calculate the kinetic energy of the swimmer.
3Which of the following are considered forms of potential energy?
4A person weighing 600 N climbs a flight of stairs. The diagonal length of the stairs is 5 m, the horizontal width is 4 m, and the vertical height is 3 m. Calculate the useful work done by the person.
5A ball is dropped from rest at point X in a vacuum. It falls a vertical distance 'h' to point Y, and then falls another vertical distance 'h' to point Z. What is the ratio of the kinetic energy at Z to the kinetic energy at Y?
6Efficiency can be mathematically represented by which of the following expressions, where E is the total energy supplied and W is the energy wasted?
7A 1.5 kg metal ball is fired into the air. At point B, its kinetic energy is 180 J and its total energy (assuming no air resistance) is 300 J. Calculate the vertical height 'h' of the ball at point B if g = 10 N/kg.
8To estimate the useful power output of a student running up a flight of stairs, which of the following measurements must be recorded?
9An electric kettle rated at 2.5 kW is used for 3.0 minutes. How much energy is transferred during this time?
10A lorry with a total mass of 15,000 kg carries sand to the top of a 50 m hill. After unloading the sand, the empty lorry has a mass of 10,000 kg. Calculate the difference in gravitational potential energy (Ep) of the sand between the bottom and the top of the hill (g = 10 N/kg).
