StudentAidUnit 2: Force and Motion — Mcqs
11th Class Physics · Unit 2: Force and Motion
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MCQ's : (Exercise + Extra)
1.The angle at which dot product becomes equal to cross product:
2.The projectile gains its maximum height at an angle of:
3.The scalar product of two vector is maximum if they are:
4.The range of projectile is same for two angles which are mutually:
5.The acceleration at the top of a trajectory of projectile is:
6.SI unit of impulse is:
7.The rate of change of momentum is:
8.As rocket moves upward during its journey, then its acceleration goes on:
9.Elastic collision involves:
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Scalars
1.A scalar is a physical quantity which is completely specified by:
2.Which of the following is a scalar quantity?
Vector
3.Name the quantity which is a vector:
Rectangular components of a vector
4.The F_x of force F of magnitude 30N making an angle of 60° with x-axis, is:
5.If a force of 10N makes an angle of 30° with x-axis its y-component is given by:
6.Maximum number of rectangular components of a vector in 2-dimension may by:
- a One
- b Two
- c Three
- d Infinite
Scalar product
7.The scalar product of two vectors A and B is zero when:
8.A vector A and B are parallel to each other then:
9.For a vector A which one of the following is correct:
Vector product
10.The vector product of two vectors A and B making an angle θ is given by:
11.If A·B = 0 when vector A and B are parallel or anti parallel, then either A or B is a:
12.Projection of \overline{B} on \overline{A} :
13.The scalar product of two vectors will be maximum if they are:
14.If A × B points along positive z-axis, then vector A and B must lie in:
15.The force F acting on charge particle 'q' moving with velocity v in a magnetic field B is given by:
16.The cross product of vector A with itself is equal to:
17.If A x B = 0 then it is concluded that:
Scalar and Vector product
18.Which of the following true?
19.The magnitudes of cross-product and dot product of two vectors are equal, the angle between the vectors is:
20.Both the dot product and cross product of two vectors \overline{A} and \overline{B} is zero when:
Magnitude of a vector
21.The magnitude of resultant of 6N force acting at right angle to a 8N force is:
22.If \overline{A} = 2\overline{i} + \overline{j} + 2\overline{k} then magnitude of (A) is:
23.The resultant of two force 3N and 4N acting parallel to each other is:
Projectile motion
24.A body thrown upward making certain angle with the horizontal and moving freely under the action of gravity is called:
25.The trajectory of projectile is:
26.During the projectile motion the horizontal component of velocity:
27.When the projectile reaches the highest point of trajectory, the vertical component of velocity is:
28.Motion of projectile is:
29.The horizontal range of projectile is:
30.For what angle of projection projectile has maximum horizontal range:
31.The maximum height attained by projectile is:
- a \frac{v_i^2 \sin^2 θ}{2g}
- b \frac{R_{max} \sin^2 θ}{2}
- c \frac{2v \sin θ}{g}
- d Both a & b
32.The velocity of projectile is maximum:
33.The value of horizontal acceleration during projectile motion:
34.The horizontal component of velocity of projectile moving with initial velocity of 500ms^{-1} at angle of 60° with x-axis is equal to:
35.If v_i is the velocity of projection and θ is the angle which the projectile makes with x-axis then the vertical component of velocity any time t is:
36.In projectile motion horizontal range depends upon:
37.The range of projectile is directly proportional to:
38.The horizontal range of a projectile at 30° with horizontal is same at an angle:
39.Which shows correct relation between H and T of projectile:
40.The angle of projection of projectile for which Height and range are equal:
Momentum
41.The SI unit of momentum is:
Equations of motion
42.A cricket ball is hit so that it travels straight up in air and it takes three seconds to reach the highest point Its initial velocity is:
43.The distance covered by a body in time 't' starting from rest is:
Impulse
44.Dimensions of impulse are similar to dimensions of:
45.SI unit of impulse is:
Rocket propulsion
46.Before launch of any rocket the mass of fuel of the rocket is about:
47.Typical rocket eject the burn gases speed at the rate.
48.The motion of a rocket is in accordance with law of conservation of:
49.Rocket ejects the burnt gasses at a speed of over (consuming fuel at rate of 10000kg/s):
Special case of collision
50.A collision in which both K.E and momentum are conserved:
51.Neutrons are slowed down if the stationary targets are:
Angle between two vector
52.If |\overline{a} + \overline{b}| = |\overline{a} - \overline{b}|, when a = b then the angle between a and b will be:
Dimension of Torque
53.The dimensions of torque are: