The racecar went from a speed of 70 m/s to a speed of 100 m/s in 10 seconds. The engine produced a force of 500 N to do this. What was the mass of the car?

Ineed the answer to question 1 , i’m desperate

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.