As the cyclist accelerates, the ____ energy store in the cyclists body decreases and the ____ energy of the cyclist increases The mass of the cyclist is 80kg. The speed of the cyclist is 12 m/s. Calculate the kinetic energy of the cyclist. Use the equation: kinetic energy=0.5xmassx(speed)squared ____ When the cyclist uses the brakes on the bicycle slows down. This causes the temperature of the brake pads to increase by 50 degrees c. The mass of the break pads is 0.040 kg. The specific heat capacity of the material of the brake pads is 418 J/KG degrees c. Calculate the change in thermal energy of the brake pads. Use the equation: change in thermal energy= mass x specific heat capacity x temperature change. ____ The internal energy of particles in the brake pads are affected by the increase in temperature. How? =The internal energy is ____

physics practice questions (2018 past paper)

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