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Miracle Learning Centre Science Tuition Question on Kinetic Theory. (O Level Science Tuition/IP Science Tuition/Secondary Science Tuition)

1. The diagram shows a car traveling at a constant speed of 30 m/s on a level road. At this speed the car has to overcome a total force of 600 N opposing the car.

a) State the value of the driving force produced by the engine for a constant speed of 30 m/s. _________________________________________________________

b) Explain why the car slows down when it climbs a hill, even though the driving force is unchanged. _________________________________________________________ _________________________________________________________ _________________________________________________________

c) When on the level road and travelling at 30 m/s, the driving force is removed and the car starts to decelerate. If the mass of the car is 800 kg, calculate the deceleration of the car due to the opposing force.

2. A gas in an enclosed container is heated uniformly. Assuming the volume of the container is constant, use the kinetic theory to explain the effect of this heating on the pressure which the gas exerts on the container. _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________

Miracle Learning Centre Answer to Science Tuition Question on Kinetic Theory. (O Level Science Tuition/IP Science Tuition/Secondary Science Tuition) 1. a) 600 N b) Some of the kinetic energy is converted into gravitational potential energy. c) Deceleration = Retarding Force / mass = 600 / 800 = 0.75 m/s2 2. When the gas in a container is heated, the gas particles gain kinetic energy and move more rapidly. Thus, they hit against the walls of the container with greater force AND greater frequency. As p = F/A, the pressure exerted on the walls of the container rises. Learn from our Science Tuition Questions and Answers. Miracle Learning Centre Call 6463 8756 or sms 8128 8342/9839 9908. (Specialist in Science and Maths) for Primary, Secondary and JC levels. Miracle Learning Centre specialises in Science tuition, Maths tuition, Chemistry tuition and Physics tuition classes.