# physics

a body is projected horizontally from height of 78.4 m with a velocity 10 m/s . its velocity after 3 sec

1. 👍 0
2. 👎 2
3. 👁 265
1. u = 10 m/s forever
v = -gt = -9.81 (3) = - 29.4 m/s

check if it hit the ground
d = (1/2) g t^2 = 4.9 * 9 = 44.1 so still in the air

speed = sqrt (10^2 + 29.4^2)

1. 👍 1
2. 👎 1
posted by Damon
2. First, check that it hasn't yet hit the ground.

Finding it has not, then get the resultant of the horizontal and vertical velocities
√(10^2 + (9.8*3)^2)
at an angle of 71° below the horizontal

1. 👍 1
2. 👎 1
posted by Steve

## Similar Questions

1. ### physics projectile

a body is projected horizontally with a velocity of 80m/s from the top of a tower 160m above the ground. find the time of flight,range,velocity at which the body strikes the ground

asked by wisdom on January 29, 2016
2. ### physic

a body is projected horizontally with a velocity of 20m/s from height of a tower 160m above the ground calculate the time of flight distance from the foot of the tower to where the object land

asked by praizefavor on March 23, 2017
3. ### physics

a body is projected with velocity v1 from a point a at the same time another body is projected vertically upwards with velocity v2 the point b lies vertically below the height the point for both the bodies to collide 2/v should be

asked by teja on November 6, 2016
4. ### Physics

If a body is projected vertically up it's velocity decreases to half of its initial velocity at a height 'h' above the ground The maximum height reached by it is Ans:4h/3

asked by Thousif on October 5, 2017
5. ### 10 th physics

Please help me to solve this problem. A body is projected vertically upwards with a velocity 20m/s. find the maximum height reached by the body.(g=10m/sec2)

asked by ramesh reddy on March 9, 2009
6. ### science

Please help me to solve this problem. A body is projected vertically upwards with a velocity 20m/s. find the maximum height reached by the body.(g=10m/sec2)

asked by ramesh reddy on March 9, 2009
7. ### physics

Please help me to solve this problem. A body is projected vertically upwards with a velocity 20m/s. find the maximum height reached by the body.(g=10m/sec2)

asked by ramesh reddy on March 9, 2009
8. ### science

find the velocity with which it hits the ground when a body is projected horizontally from top of a tower 100 meter high with a velocity of 9.8 meter per second.

asked by avinash on March 31, 2015
9. ### Physics

A body is projected with an initial velocity 300m\s at an angle 60 with the vertical;determine :1.the velocity at the maximum height 2.The maximum height reached

asked by christian on September 11, 2016
10. ### physics

A body is projected horizontally with a velocity of 80m/s from the top of a tower 160m above the ground (given that g=10m/s2).Find (1)time of flight. (2)Range

asked by ROKEEB on November 8, 2018

More Similar Questions