English
Karnataka Board PUCPUC Science Class 11

Shown are several curves (Figure). Explain with reason, which ones amongst them can be possible trajectories traced by a projectile (neglect air friction). - Physics

Advertisements
Advertisements

Question

Shown are several curves (Figure). Explain with reason, which ones amongst them can be possible trajectories traced by a projectile (neglect air friction).

Options

MCQ
Advertisements

Solution

Explanation:

Here, the trajectory of path which is followed by the projectile under the gravitational force of earth will be a conic section or parabolic or elliptical or focus must be with centre. So, accordingly, only is required which shows centre of earth as focus of trajectory.

shaalaa.com
  Is there an error in this question or solution?
Chapter 8: Gravitation - Exercises [Page 62]

APPEARS IN

NCERT Exemplar Physics [English] Class 11
Chapter 8 Gravitation
Exercises | Q 8.31 | Page 62

RELATED QUESTIONS

Choose the correct answer from among the given ones:

For the problem 8.10, the direction of the gravitational intensity at an arbitrary point P is indicated by the arrow (i) d, (ii) e, (iii) f, (iv) g.


How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5 × 108 km.


Can we apply Newton’s third law to the gravitational force ? Explain your answer.


State the universal law of gravitation. Name the scientist who gave this law.


Universal law of gravitation states that every object exerts a gravitational force of attraction on every other object. If this is true, why don’t we notice such forces ? Why don’t the two objects in a room move towards each other due to this force ?


A body is suspended from a spring balance kept in a satellite. The reading of the balance is W1 when the satellite goes in an orbit of radius R and is W2 when it goes in an orbit of radius 2 −R.


Four particles of equal masses M move along a circle of radius R under the action of their mutual gravitational attraction. Find the speed of each particle.


Two small bodies of masses 10 kg and 20 kg are kept a distance 1.0 m apart and released. Assuming that only mutual gravitational forces are acting, find the speeds of the particles when the separation decreases to 0.5 m.


A solid sphere of mass m and radius r is placed inside a hollow thin spherical shell of mass M and radius R as shown in the following figure . A particle of mass m' is placed on the line joining the two centres at a distance x from the point of contact of the sphere and the shell. Find the magnitude of the resultant gravitational force on this particle due to the sphere and the shell if (a) r < x < 2r, (b) 2r < x < 2R and (c) x > 2R.


A thin spherical shell having uniform density is cut in two parts by a plane and kept separated as shown in the following figure. The point A is the centre of the plane section of the first part and B is the centre of the plane section of the second part. Show that the gravitational field at A due to the first part is equal in magnitude to the gravitational field at B due to the second part.


The mass of moon is about 0.012 times that of earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be:


Who stated the law of gravitation?


Name and state the action and reaction in the following case:
Hammering a nail.


Give the applications of universal law gravitation.


The force of gravitation between two bodies of mass 1 kg each separated by a distance of 1 m in vacuum is ____________.


How is the gravitational force between two point masses affected when they are dipped in water keeping the separation between them the same?


Write the answer of the question with reference to laws of gravitation.

Write the value of the universal gravitational constant.


Four identical particles of equal masses 1 kg made to move along the circumference of a circle of radius 1 m under the action of their own mutual gravitational attraction. The speed of each particle will be ______.


Observe the figure and answer the questions:

  1. State Newton's universal law of gravitation.
  2. If the distance between the two bodies is tripled, how will the gravitational force between them change?
  3. What will happen to gravitational force, if mass of one of the object is doubled?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×