Time of flight of projectile launched horizontally An object of mass 8 kg is projected horizontally with a speed of 21.1 ms-1 from the top of the cliff. The height of the cliff
is 41.9 m. Take g, the acceleration due to gravity, to be 9.8 ms-2.
The object is in flight for
O a. 2.9 s
O b. 4.15
O c. 8.6 s
O d. 14.3 s
O e. 2.1s
Check

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.