Lesson: Chapter - 11

Practice Questions

Questions 1–3 refer to a ball of mass m on a string of length R, swinging around in circular motion, with instantaneous velocity v and centripetal acceleration a.

1. What is the centripetal acceleration of the ball if the length of the string is doubled?
(A) a/4
(B) a/2
(C) a
(D) 2a
(E) 4a
2. What is the centripetal acceleration of the ball if the instantaneous velocity of the ball is doubled?
(A) a/4
(B) a/2
(C) a
(D) 2a
(E) 4a
3. What is the centripetal acceleration of the ball if its mass is doubled?
(A) a/4
(B) a/2
(C) a
(D) 2a
(E) 4a
4. A bullet of mass m traveling at velocity v strikes a block of mass 2m that is attached to a rod of length R. The bullet collides with the block at a right angle and gets stuck in the block. The rod is free to rotate. What is the centripetal acceleration of the block after the collision?
(A) v2/R
(B) (1/2)v2/R
(C) (1/3)v2/R
(D) (1/4)v2/R
(E) (1/9)v2/R
5. A car wheel drives over a pebble, which then sticks to the wheel momentarily as the wheel displaces it. What is the direction of the initial acceleration of the pebble?
(A)
(B)
(C)
(D)
(E)
6. If we consider the gravitational force F between two objects of masses m1 and m2 respectively, separated by a distance R, and we double the distance between them, what is the new magnitude of the gravitational force between them?
(A) F/4
(B) F/2
(C) F
(D) 2F
(E) 4F
7. If the Earth were compressed in such a way that its mass remained the same, but the distance around the equator were just one-half what it is now, what would be the acceleration due to gravity at the surface of the Earth?
(A) g/4
(B) g/2
(C) g
(D) 2g
(E) 4g
8. A satellite orbits the Earth at a radius r and a velocity v. If the radius of its orbit is doubled, what is its velocity?
(A) v/2
(B) v/
(C) v
(D) v
(E) 2v
9. An object is released from rest at a distance of 2rc from the center of the Earth, where rc is the radius of the Earth. In terms of the gravitational constant (G), the mass of the Earth ( M), and rc, what is the velocity of the object when it hits the Earth?
(A)
(B)
(C)
(D)
(E)
10. Two planets, A and B, orbit a star. Planet A moves in an elliptical orbit whose semimajor axis has length a. Planet B moves in an elliptical orbit whose semimajor axis has a length of 9a. If planet A orbits with a period T, what is the period of planet B’s orbit?
(A) 729T
(B) 27T
(C) 3T
(D) T/3
(E) T/27
Back Next

Next to display next topic in the chapter.

Practice Questions

Video Lessons and 10 Fully Explained Grand Tests

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

SAT Reasoning GRE General GMAT Test
More for You
MCQ with question Explanations Scholarships and Financial Aid

NTS GAT General Preparation

Prepare NTS GAT General paper-base and online

GRE General Preparation

Prepare GRE General paper-base and online

Biology for Test Preparation

Prepare Biology for tests with lessons and practice mcq

All in this Category

You may be interested in

Defence Authority Degree College - Karachi

A popular name in the colleges of K ...

Edwardes College - Peshawar

Edwardes College - Peshawar is a po ...

Study in Australian - Schools

Get school education in Australia. ...

FBR Post of Income Tax Inspector

Learn about the FBR Post of Income ...

ISSB Speech Test

Learn all about ISSB Speech Test. H ...

GMAT: Graduate Management Admission Test

GMAT is the most popular test for a ...

AIMC - MBBS

Allama Iqbal Medical College MBBS d ...

FMH - Mdecal Degrees

FMH College of Medicine & Dentistry ...

About us

EntryTest.com is a test preparation service for students seeking successful career.

About Disclaimer

Quick Test Prep

NUST NET IBA Karachi SAT LUMS LCAT LSE

 

NTS GAT NTS NAT GMAT GRE ACT

Study Abroad

Education Abroad Business Schools MS in USA