Q: Which of the following is an example of vector product of two vectors? (Entry test 2010)
Answer: B. angular momentum
Q: The angle subtended by a vector A = i − j with x-axis is (Entry test 2010)
Answer: D. 315°
Q: The minimum number of unequal forces whose vector sum can be zero are (Entry test 2010)
Answer: C. Three
Q: The magnitude of the resultant of two forces is 2F. If the magnitude of each force is F, then the angle between these forces is (Entry test 2010)
Answer: A. 0°
Q: Two forces of magnitude 20 N and 10 N act at a point then which one of the following cannot be their possible sum? (Entry test 2012)
Answer: D. 35 N
Q: Which one of the following is not a vector quantity? (Entry test 2012)
Answer: D. electromotive force
Q: Two equal, parallel and non-concurrent forces that produce only angular acceleration are (Entry test 2012)
Answer: A. couple
Q: The minimum number of forces that keep the body in equilibrium are (Entry test 2012)
Answer: A. two
Q: If two forces P and Q are such that |P + Q| = |P − Q|, then the angle between P and Q is (Entry test 2009/2012)
Answer: C. 90°
Q: Two concurrent forces have a maximum resultant of 45 N and minimum resultant of 5 N. What is the magnitude of each force? (Entry test 2009)
Answer: C. 20,25 N
Q: How are two vectors of the same magnitude oriented to get a resultant of the same magnitude? (Entry test 2009)
Answer: D. 120°
Q: If Ā = 2î + ĵ + 2k̂, then its magnitude is (Entry test 2010)
Answer: C. 3
Q: The angle subtended by a vector Ā = î − ĵ, with x-axis is (Entry test 2010)
Answer: D. 315°
Q: ĵ · (k̂ × ĵ) is equal to (Entry test 2010)
Answer: B. zero
Q: Three vectors of equal magnitude are acting on the three sides of an equilateral triangle. The magnitude of their resultant is (Entry test 2011)
Answer: C. √3
Q: The point at which an applied force produces linear motion but no rotatory motion is (Entry test 2011)
Answer: B. centre of gravity
Q: A projectile is launched at 45° to the horizontal with initial kinetic energy E. What will be the K.E of projectile when it reaches its highest point? (2014)
Answer: A. 0.50 E
Q: A body is released from the top of an inclined plane that makes an angle θ with the horizontal. The coefficient of friction is estimated best with. (2004)
Answer: D. cotθ
Q: Which pair of the following physical quantities have the same dimensions? (2005)
Answer: D. torque,density
Q: A stone is thrown straight up and reaches a height H. Before falling back to the ground after T seconds, its average speed during T is (2005)
Answer: D. HT