हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान कक्षा ११

A Ball is Thrown Horizontally from a Point 100 M Above the Ground with a Speed of 20 M/S. Find the Horizontal Distance It Travels before Reaching the Ground . - Physics

Advertisements
Advertisements

प्रश्न

A ball is thrown horizontally from a point 100 m above the ground with a speed of 20 m/s. Find the horizontal distance it travels before reaching the ground .

टिप्पणी लिखिए
Advertisements

उत्तर

Given:
Speed of the ball, ux = 20 m/s
Height from which the ball is dropped, h = 100 m

 Horizontal distance travelled by the ball:
x = ux= 20 × 4.5 = 90 m

 

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Rest and Motion: Kinematics - Exercise [पृष्ठ ५२]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 1 [English] Class 11 and 12
अध्याय 3 Rest and Motion: Kinematics
Exercise | Q 32.2 | पृष्ठ ५२

संबंधित प्रश्न

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m/s. How much time does the ball take to return to his hands? If the lift starts moving up with a uniform speed of 5 m/s and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands?


In a projectile motion the velocity 


A train starts from rest and moves with a constant acceleration of 2.0 m/s2 for half a minute. The brakes are then applied and the train comes to rest in one minute. Find the total distance moved by the train.


A bullet going with speed 350 m/s enters a concrete wall and penetrates a distance of 5.0 cm before coming to rest. Find the deceleration.

 

Complete the following table:

Car Model Driver X
Reaction time 0.20 s
Driver Y
Reaction time 0.30 s
A (deceleration on hard braking = 6.0 m/s2) Speed = 54 km/h
Braking distance
a = ............
Total stopping distance
b = ............
Speed = 72 km/h
Braking distance
= ...........
Total stopping distance
d = ............
B (deceleration on hard braking = 7.5 m/s2) Speed = 54 km/h
Breaking distance
e = ...........
Total stopping distance
f = ............
Speed 72 km/h
Braking distance
g = .............
Total stopping distance
h = ............

 


A police jeep is chasing a culprit going on a motorbike. The motorbike crosses a turning at a speed of 72 km/h. The jeep follows it at a speed of 90 km/h, crossing the turning ten seconds later than the bike. Assuming that they travel at constant speeds, how far from the turning will the jeep catch up with the bike?

 

A ball is projected vertically upward with a speed of 50 m/s. Find the time to reach the maximum height .


A ball is projected vertically upward with a speed of 50 m/s. Find the speed at half the maximum height. Take g = 10 m/s2


A stone is thrown vertically upward with a speed of 28 m/s. Find the maximum height reached by the stone. 


A stone is thrown vertically upward with a speed of 28 m/s.Find its velocity one second before it reaches the maximum height.


A person sitting on the top of a tall building is dropping balls at regular intervals of one second. Find the positions of the 3rd, 4th and 5th ball when the 6th ball is being dropped.


An NCC parade is going at a uniform speed of 6 km/h through a place under a berry tree on which a bird is sitting at a height of 12.1 m. At a particular instant the bird drops a berry. Which cadet (give the distance from the tree at the instant) will receive the berry on his uniform?


A ball is dropped from a height of 5 m onto a sandy floor and penetrates the sand up to 10 cm before coming to rest. Find the retardation of the ball is sand assuming it to be uniform.


A ball is thrown horizontally from a point 100 m above the ground with a speed of 20 m/s. Find the time it takes to reach the ground .


A river 400 m wide is flowing at a rate of 2.0 m/s. A boat is sailing at a velocity of 10 m/s with respect to the water, in a direction perpendicular to the river. Find the time taken by the boat to reach the opposite bank. 


A river 400 m wide is flowing at a rate of 2.0 m/s. A boat is sailing at a velocity of 10 m/s with respect to the water, in a direction perpendicular to the river. How far from the point directly opposite to the starting point does the boat reach the opposite bank?


An aeroplane has to go from a point A to another point B, 500 km away due 30° east of north. A wind is blowing due north at a speed of 20 m/s. The air-speed of the plane is 150 m/s. Find the time taken by the plane to go from A to B.


A man is standing on top of a building 100 m high. He throws two balls vertically, one at t = 0 and other after a time interval (less than 2 seconds). The later ball is thrown at a velocity of half the first. The vertical gap between first and second ball is +15 m at t = 2 s. The gap is found to remain constant. Calculate the velocity with which the balls were thrown and the exact time interval between their throw.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×