Conceptual question for Motion in a plane

1. A ball is projected upward at a certain angle with the horizontal .which of the following statement is/are correct. At highest point
a. velocity of the projectile is not zero
b. acceleration of the projectile is zero
c. velocity of the projectile is along the horizontal direction
d. Acceleration of the projectile is vertically upwards

2.which one of the following statement is correct?
a. A body has constant speed but varying velocity
b. A body has constant speed but varying acceleration
c. A body having constant speed cannot have acceleration
d. None of the above

3.which of the following remains constant durng the motion of the projectile fired from a planet
a. KE
b. Momentum
c. Vertical component of the velocity
d. Horizontal component of the velocity

4.what is wrong for a body having uniform circular motion?
a. Speed of the body is constant
b. Acceleration is directed towards the centre
c. Velocity and Acceleration vector are having an angle 45
d. none of the above

5.A body moves along a semicircular track of Radius R.Which of the following statement is true
a. Displacement of the body is 2R
b Distance travelled by the body is πR
c Displacement of the body is πR
d none of the above

6.which of the following is false
a. The speed of the particle at any instant is given by the slope of the displacement-time graph
b. The distance moved by the particle in a time interval from t1 to t2 is given by the area under the velocity -time graph during that time interval
c. Magnitude of the acceleration of the particle at any instant is given by the slope of the velocity time graph
d none of the above

7. A particle is going moving along x-axis.which of the following statement is false
a. At time t1 (dx/dt)t=t1=0,then (d2x/dt2)t=t1=0
b.At time t1 (dx/dt)t=t1 < 0 then the particle is directed towards origin
c.if the velocty is zero for a time interval ,the acceleration is zero at any instant with in the time interval.
d. At time t1 (d2x/dt2)t=t1 < 0 then the particle is directed towards origin

8.A particle starts at time t=0 from x=0 along the positive x-axis with constant speed v .After time t,it return back towards the orgin with the speed 2v and reaches the origin in t/2 sec .Which of the following is true for the whole process
a. Average velocity is zero for the whole process
b Average speed is 4/3v for the whole process
c.Displacment at time t is equal to vt
d. Displacment at time 3t/2 is 2vt

9. The range of the projectile depends upon
a. Angle of the projection
b. Acceleration due to gravity
c. Mass of the projectile
d. The magnitude of the velocity of projection

10. Two bullets A and B are fired horizontally with speed v and 2v respectively.which of the following is true
a. Both will reach the ground in Same time
b. Bullet with speed 2v will cover more horizontal distance on the groud
c.B will reach the ground in less time then A
d. A will reach the ground in less time then B

Solutions

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