A car with mass 500 kg is traveling at a speed of 20 m/s. The driver applies the brake until the car comes to a stop. Find the work done on the car

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.