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What should be the angle of projection to obtain max. height and max.time of flight

Posted by Kavi Bharathi 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Isha Gupta 8 years, 3 months ago

For Max height and for max time, angle=90

ANSWER

If a position of a particle at instant is given by x=t×t×t find the acceleration of particle when t=2second

Posted by Ayush Kumar 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Isha Gupta 8 years, 3 months ago

a=12

ANSWER

Why do we need to classify elements

Posted by Harshita Baroda 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A cup contain 250 gmof water a numberof positive charge present in cup of water ?

Posted by Sumit Chougule 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A solid cylinder of mass 20kg rotates about its axis with angular speed of 100rad/s . The radius of the cylinder is 0.1m. What is the kinetic energy associated with the rotation off the cylinder

Posted by Zoya A 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is a unit?

Posted by Subham Kumar Jha 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is the tension in a rod of length l and mass m at a distance of y from F1 when rod is acted upon by two unequal forces F1 andF2

Posted by Sarbani Thakur 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is motion of a body in a lift

Posted by Ankita Dhali 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Bhawani Tanwar 8 years, 3 months ago

Upward or downward.

ANSWER

Position time graph of uniform motion

Posted by Sweety Sweet 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Rahul Poddar 8 years, 3 months ago

Straight line from origin in x-y plane

ANSWER

A balloon, going upwards with a velocity of 12m/s,is at a height of 65m from the earth any instant. Exactly at this instant a packet dropped from it. How much time will the packet take to reach the ground?

Posted by Sri Srinivas 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

In a car 5s a the speed of bus increase from 25km/h to 70km/h . What is the average acceleration of the bus

Posted by Mohan Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A cylinder rests in a supporting carriage as shown the side AB of carriage makes an angle 30 degree with the horizontal and side BC is vertical. The magnitude of normal reaction exerted by sides AB and BC of carriage on the cylinder be N and N AB BC respectively neglect friction everywhere. Then as the magnitude of acceleration a of the carriage is increased pick up the correct statement a)

Posted by Varsha Nambiar 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Kamal Sharma 5 years, 4 months ago

The free body diagram of cylinder w.r.t carriage is as shown. Since net acceleration of cylinder is horizontal, NABcos30∘=mg or NAB=23–√mg F.B.D of cylinder w.r.t to carriage and NBC=ma+NABsin30∘ Hence NAB remains constant and NBC increases with increase in a.

ANSWER

State and prove energy conservation law.

Posted by Vinay Verma 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Rahul Poddar 8 years, 3 months ago

The total mechanical energy of a body is conserved during free falling It can be prove by free falling body diagram given in ncert

ANSWER

Latent heat of Ice

Posted by Ankit Raj 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Latent heat of water

Posted by Ankit Raj 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is positive work

Posted by Devendra Yadav 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Bhawani Tanwar 8 years, 3 months ago

When workdone takes place in the direction of the applied force .

ANSWER

What are the basic forces in nature?

Posted by Satyanarayana Manelthi 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Sahdev Sharma 8 years, 3 months ago

The Four Fundamental Forces of Nature are Gravitational force, Weak Nuclear force, Electromagnetic force and Strong Nuclear force.

ANSWER

Why it is easy to pull o pulley?

Posted by Vandana Amol 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Rahul Poddar 8 years, 3 months ago

The effective weight of pulley when it is pulled is W-Fsin thita 2nd- effective friction on pulley is Fr=u (mg-Fsin thita)

ANSWER

Derivation of motion's third equation by graphical method.

Posted by Ekansh Verma 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Examples of first law of motion

Posted by Amit Gurjar 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Drishty Kamboj 8 years, 3 months ago

Examples 1-a cycle is moving with 5km/hr but by a sudden push make a cycle to move 7km/hr It means that the external force exerted on body leads change in its speed 2-an electronic remote control car is moving with a uniform speed and a boy appliedv force in one side of the car this leads change in object direction W. R. T. The initial direction 3a plastics ball change its shape on applying external force

ANSWER

Examples of 1st law of motion

Posted by Amit Gurjar 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Drishty Kamboj 8 years, 3 months ago

Take a glass a paper and a ₹5 coin. Put the paper up the glass and the coin on the paper. When you make a moderate hit on paper, paper will fall away from glass and the coin fall in the glass. This is due to it's inertia

ANSWER

Velocity

Posted by Viresh Jadon 8 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Bhawani Tanwar 8 years, 3 months ago

It is the rate of change of displacement .

Drishty Kamboj 8 years, 3 months ago

Speed in a particular direction is velocity

ANSWER

A baseball is thrown with velocity Vnot at angle theta above horizontal. How far throwing point will it attain its original leave.

Posted by Rishabh Jaiswal 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What fraction of its mechanical energy is lost in each bounce if aball bounces to 80 percent of its original height

Posted by Atul Jha 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

A ball is dropped from a balloon going up at a speed 7m/s if the balloon was at a height 60 m at the time of dropping the ball how long will the ball take in reaching the ground

Posted by Madhu Kumari 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is angular momentum

Posted by Neeraj Singh 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

explain what is esaier pulling or pushing

Posted by Anjali Sharma 8 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Anjali Garg 8 years, 3 months ago

Soory pull is easier then pushing because we have to applied less force on pulling

Anjali Garg 8 years, 3 months ago

Pushing is easier because we have to applied less force on pushing

ANSWER

How show pull is easier than push mathematically

Posted by Shrey Shekhar 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Prove that vector b- vector a =vector c

Posted by Nitika Kerongi 8 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

How many watt in 1 horse power?

Posted by Leela Devi 8 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Amar Kumar 8 years, 3 months ago

One mechanical horsepower unit is approximately equal to 745.7 watt.

ANSWER

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