The designated course for a 6 kilometer road race has the runners going 4.5 km west and then 1.5 km north,
where the finish line is located. a less-than-honest contestant in the race runs 2.5 km west and then decides
to head straight toward the finish line. what distance does this wanna-be actually cover during his race?

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?

What happens when the number of protons in an atom changes