Grade 11Mechanics

The celing of a long hall is 25m high.What is the maximum Horizontal distance that a ball thrown with a spEed of 40m/s can go without hitting the ceiling of the ball?

Rohith

7 Years agoGrade 11

3 Answers

janga vidya charan reddy

7 Years ago

Hello Rohith,

That’s very simple if you know the concept of projectile motion and equations in kinematics.

Just apply; S=u X rootover(2h/g) [Speed=Distance/Time]

Where rootover(2h/g) stands for time of flight; S for Maximum horizantal distance; u for speed.

Now put down the given values in the equation.

S=40xrootover(2x25/10)

S=40 rootover5.

That’s your answer!

Hope your query is cleared to a large extent.

If you like the answer please approve it.

Thank you,

Your regards,

Vidya Charan.

Prerna

7 Years ago

Hi Rohith,

This is the case of a projectile motion

First of all we have to find out the angle of projection.

Using , h= u^2 (sinQ)^2 / 2g

here h= 25 m

g= 10 m/s^2

Solving this we get sinQ = square root 5 / 4

By this we can also find out cos Q by right angle triangle law , which comes out to be = square root 11/ 4

The range of a projectile = 2 u^2 sinQ cosQ /g

Putting values we get range as 20 × square root 55

Hope it helps you☺

surendra surendra

7 Years ago

GIVEN, h=25m ,u=40m/s g=10m/s ^2 H=u^2 sin^2theta /2g substitute the values. You get the theta. Then find the value of R= u^2sin2theta/ g .Then you get the correct answer

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

mechanics

1 Answer Available

Last Activity: 10 Months ago

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11
21
31
41

mechanics

1 Answer Available

Last Activity: 10 Months ago

A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mm
at the free end, where a small mass of 2 g is positioned. determine
(i) The velocity of the end when passing through the zero position
(ii) The acceleration at maximum displacement
(iii) The maximum kinetic energy of the mass

mechanics

2 Answers Available

Last Activity: 3 Years ago

An object of mass m = 0.25 kg oscillates in a fluid at the end of a vertical spring of spring
constant kH = 85 N/m, see Fig.1. The effect of the fluid resistance is governed by the
damping constant b = 0.07kg/s.
(i) Find the period of the damped oscillation.
(ii) By what percentage does the amplitude of the oscillation decrease in each cycle?

mechanics

1 Answer Available

Last Activity: 3 Years ago

If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0

mechanics

1 Answer Available

Last Activity: 3 Years ago

View all Questions

The celing of a long hall is 25m high.What is the maximum Horizontal distance that a ball thrown with a spEed of 40m/s can go without hitting the ceiling of the ball?

Rohith

3 Answers

janga vidya charan reddy

Prerna

surendra surendra

Other Related Questions on mechanics

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.11213141

If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11
21
31
41