Which statement best describes the energy changes that occur while a child is riding on a sled down a steep, snow-covered hill? @4.3.8.a @2

a)
kinetic energy decreases and potential energy increases.

b)
kinetic energy increases and potential energy decreases.

c)
both potential and kinetic energy decrease.

d)
both potential and kinetic energy increase

In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.