24) A car is traveling at a constant speed of 30 km/hr in a circle of radius 200m. Which of the following is true about the acceleration of the car? a) It is zero since the speed is constant b) It is zero since the velocity is constant c) There is acceleration due to changing velocity. d) The acceleration is negligible due to the radius of the circle. 25) The gravitational force on mars is a little more than one-third of that on earth. If a basketball player were to jump vertically with the same initial velocity on Mars as she does on Earth, then the amount of time taken to reach maximum height would be; a) 3 times less b) 3 times more c) 9 times less d) 9 times more