0
If an object is thrown in an upward direction from the top of a building 160 ft high at an initial speed of 21point82 mph what is its final speed when it hits the ground?
Mizyangel16
g = 9.81 m/s^2 , 160 feet = 48.768 metres, 21.82 mph = 9.754 metres/sec.
it passes top of building on way down at same speed so :
u = 9.754 m/s
v = ?
g = 9.81 m/s^2
s = 48.768 metres
if : v = square root of (u^2 +( 2 * g * s))
then : v = 32.434 m/s ( 72.55 mph )
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
A 5 kg object is thrown from the top of a building 275m aboce some level ground It is released at a speed of 45 m per s initially along the horizontal direction?
THE QUESTION: 2) A 5 kg object is thrown from the top of a building, 275m aboce some level ground. It is released at a speed of 45 m/s, initially along the horizontal direction. (A) What are the magnitude and direction of its velocity at impact on the ground below (B) what momentum does it have at impact (C) What KE does it have just before impact (D) What is the average force during the impact?
Why does building foundations have a large horizontal area of contact with the ground?
this is because when the area of contact between the ground and the building increases the pressure exerted by the building will be less for the same force.
What is bounce?
Bounce is a change of direction after hitting the ground.
Which direction do tornadoes move once they are on the ground?
A tornado can move in any direction, but the generally travel northeast.
What is the potential energy at the ground?
Potential energy depends upon the datum(initial condition ) chosen.If we take ground as datum potential energy is zero
What do you call the initial cutting and breaking of soil?
The initial cutting and breaking of soil is referred to as "ground breaking". Ground breaking ceremonies are typically conducted when building is about to commence of a structure or land development.
A brick is released with no initial speed from the roof of a building and strikes the ground in 2.00 s encountering no appreciable air drag How tall in meters is the building?
19.6m
While standing on the roof of a building, a child tosses a tennis ball with an initial speed of 15 m/s at an angle of 35° below the horizontal. The ball lands on the ground 2.6 s later. How tall, in meters, is the building?
The height of the building is 57.3 meters.
A 5 kg object is thrown from the top of a building 275m aboce some level ground It is released at a speed of 45 m per s initially along the horizontal direction?
THE QUESTION: 2) A 5 kg object is thrown from the top of a building, 275m aboce some level ground. It is released at a speed of 45 m/s, initially along the horizontal direction. (A) What are the magnitude and direction of its velocity at impact on the ground below (B) what momentum does it have at impact (C) What KE does it have just before impact (D) What is the average force during the impact?
Example of 3 laws of motion?
when we walk on the ground, our feet pushes the ground in backward direction, as a reaction ground pushes us in forward direction hence we can walk on the ground.
Will two free fall bodies with different initial speeds reach ground together?
No. The one with higher initial speed will hit the ground first if they are both thrown straight down.
Which will hit the ground first a ball thrown horizontally at 2 meters per second off a building 20 m high or a ball dropped by a hand at the same height?
They should reach the ground together, since their initial vertical speed is the same, namely zero.
Which information is needed to find the time a projectile is in motion?
The object's initial distance above the ground The object's initial velocity
Why does building foundations have a large horizontal area of contact with the ground?
this is because when the area of contact between the ground and the building increases the pressure exerted by the building will be less for the same force.
Why building foundation have large horizontal area of contact with the ground?
this is because when the area of contact between the ground and the building increases the pressure exerted by the building will be less for the same force.
Are the neutral and ground bonded in a sub-panel of an out building?
The neutral and ground are only bonded in a sub-panel of an out building if the code requires a buried ground rod or plate at this location.
How is newtons law and earthquakes related?
Newton's law of inertia applies: A body in motion tends to stay in motion, and a body at rest tends to stay at rest. This applies to earthquakes because a building or other large, fixed object is "at rest" and is not designed to be in motion. When the land vibrates and moves under a building due to an earthquake, the building has the contravening forces of inertia (the at-rest building tends to try to stay at rest) versus the ground under the building moving, and the ground doesn't play nice by moving smoothly and continuously in one direction. If it were not for inertia, the building and its contents (including people!) would simply move with the ground, and neither the building nor its contents would suffer damage.
