«

»

Sep 13

Print this Post

The problem of a rock thrown vertically up

A rock is thrown vertically upward from the ground with an initial speed 15m/s.

a. how high does it go
b. how much time is required for the rock to reach its maximum height?
c. what is the rock’s height at t=2.00s?

(Posted by Merhawi)

Answer:

(a)

u=15m/s

a=-10m/s2

v=0 m/s (at the max height)

S=?

v2-u2=2aS

S=v2-u2/2a

=225/20

=11.25 m

(b) From the above case

using v=u+at

t=v-u/a=1.5s

(c) Use S = ut + 1/2 at2

put t=2s, u = 15m/s, a=-10m/s2

S=30 – 20 = 10 m

(If you use g = 9.8 m/s2 The answers will be slightly different)

Incoming search terms:

  • Is anger physical quantity
  • kinematics passing question
  • a rock is thrown up with speed of 15
  • ques of kinematics
  • physics problem of the day
  • physics (what is conservation of momentum?)
  • maximum height of a rock thrown
  • distance on electron due to gravity
  • A rock is thrown vertically upward from the ground with an initial speed
  • rock thrown vertically physics equation


Permanent link to this article: http://www.plustwophysics.com/the-problem-of-a-rock-thrown-vertically-up-3/

%d bloggers like this: