Engineering Entrance Sample Papers

# JEE Physical World and Measurement Questions ## Physical World and Measurement (JEE Mains Physics)

 Question 1
If the resultant of the two forces has a magnitude smaller than the magnitude of larger force, the two forces must be
 A Point in opposite directions B Different both in magnitude and direction C Mutually perpendicular to one another D Possess extremely small magnitude
 Question 2
Any vector in an arbitrary direction can always be replaced by two (or three)
 A Mutually perpendicular vectors which have the original vector as their resultant B Parallel vectors which have the original vector as their resultant C It is not possible to resolve a vector D Arbitrary vectors which have the original vector as their resultant
 Question 3
A boy walks uniformally along the sides of a rectangular park of size 400 m × 300 m, starting from one corner to the other corner diagonally opposite. Which of the following statement is incorrect
 A His velocity is not uniform throughout the walk B His displacement is 500 m C His displacement is 700 m D He has travelled a distance of 700 m
 Question 4
There are two force vectors, one of 5 N and other of 12 N at what angle the two vectors be added to get resultant vector of 17 N, 7 N and 13 N respectively
 A 0°, 90° and 180° B 0°, 90° and 90° C 0°, 180° and 90° D 180°, 0° and 90°
 Question 5
How many minimum number of coplanar vectors having different magnitudes can be added to give zero resultant
 A 3 B 5 C 2 D 4
 Question 6
A particle is simultaneously acted by two forces equal to 4 N and 3 N. The net force on the particle is
 A 5 N B 7 N C 1 N D Between 1 N and 7 N
 Question 8
 A 10 units B 5 units C 11 units D 18 units
 Question 9
The vector sum of two forces is perpendicular to their vector differences. In that case, the forces
 A Are equal to each other in magnitude B Are not equal to each other in magnitude C Cannot be predicted D Are equal to each other
 Question 10
Three concurrent forces of the same magnitude are in equilibrium. What is the angle between the forces ? Also name the triangle formed by the forces as sides

Related: KCET Physics Question Papers

 A 120° equilateral triangle B 120°, 30°, 30° an isosceles triangle C 60° equilateral triangle D 120° an obtuse angled triangle
 Question 11
A 150 m long train is moving to north at a speed of 10 m/s. A parrot flying towards south with a speed of 5 m/s crosses the train. The time taken by the parrot the cross to train would be:
 A 8 s B 15 s C 10 s D 30 s
 Question 12
Two vector A and B have equal magnitudes. Then the vector A + B is  perpendicular to
 A A x B B A – B C All of these D 3A – 3B
 Question 13
The sum of two forces acting at a point is 16 N. If the resultant force is 8 N and its direction is perpendicular to minimum force then the forces are
 A 8 N and 8 N B 6 N and 10 N C 2 N and 14 N D 4 N and 12 N
 Question 14
When three forces of 50 N, 30 N and 15 N  act on a body, then the body is
 A Moving with a uniform velocity B Moving with an acceleration C In equilibrium D At rest
 Question 15
 A 30° B 45° C 90° D 60°
 Question 16
Two equal forces (P each) act at a point inclined to each other at an angle of 120°. The magnitude of their resultant is
 A P / 4 B 2P C P D P / 2
 Question 17
Which of the following is a vector
 A None of these B Pressure C Surface tension D Moment of inertia
 Question 18
A person goes 10 km north and 20 km east. What will be displacement from initial point
 A 2 km B 5 km C 20 km D 22.36 km
 Question 19
If a body is in equilibrium under a set of non-collinear forces, then the minimum number of forces has to be
 A Two B Four C Five D Three
 Question 20
Two cars are moving in the same direction with the same speed 30 km/hr. They are separated by a distance of 5 km, the speed of a car moving in the opposite direction if it meets these two cars at an interval of 4 minutes, will be
 A 15 km/hr B 45 km/hr C 40 km/hr D 30 km/hr
There are 20 questions to complete. 