Motion In A Plane CBSE Questions & Answers

Motion In A Plane

This is Physics Class 11 Motion in a Plane CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
A ball is thrown upwards with an initial velocity of 10 m \({{\rm{s}}^{ - {\rm{1}}}}\). Determine the maximum height reached above the thrower’s hand. Determine the time it takes the ball to reach its maximum height.
  • A
    5.43 m, 0.92 s
  • B
    5.10 m, 1.02 s
    Correct
  • C
    5.23 m, 1.12 s
  • D
    5.25 m, 0.42 s
2
A cricketer hits a cricket ball from the ground so that it goes directly upwards. If the ball takes, 10 s to return to the ground, determine its maximum height.
  • A
    132.5 m
  • B
    112.5 m
  • C
    122.5 m
    Correct
  • D
    152.5 m
3
A car is moving at constant speed on a circular track. Which of the following statements is true?
  • A
    The car has zero instantaneous velocity
  • B
    The car has constant acceleration magnitude
    Correct
  • C
    The car has varying acceleration magnitude
  • D
    The car has zero acceleration
4
The reason why cyclists bank when taking a sharp turn is
  • A
    to supply the acceleration required to move fast
  • B
    cyclists enjoy turning to one side and so bank
  • C
    to supply the sidewise (centripetal) acceleration required to make the direction change
    Correct
  • D
    to decelerate at the turns as turns are dangerous
5
A motorcycle stunt rider rides off the edge of a cliff. Just at the edge his velocity is horizontal, with magnitude 9.0 m/s. Find the magnitude of the motorcycle’s position vector 0.50 s after it leaves the edge of the cliff.
  • A
    4.7 m
    Correct
  • B
    4.3 m
  • C
    5.2 m
  • D
    3.5 m
6
A motorcycle stunt rider rides off the edge of a cliff. Just at the edge his velocity is horizontal, with magnitude 9.0 m/s. Find the magnitude of the motorcycle’s velocity vector 0.50 s after it leaves the edge of the cliff
  • A
    10.2 m/s
    Correct
  • B
    11.3 m/s
  • C
    9.65 m/s
  • D
    8.98 m/s
7
A batter hits a baseball so that it leaves the bat at speed \({{\rm{v}}_0}\)= 37.0 m/s at an angle a = 53.1\(^\circ \). Find the position of the ball and its velocity (magnitude and direction) at t = 2.00 s
  • A
    25.4 m/s at 23.2\(^\circ \) above the horizontal
  • B
    26.4 m/s at 23.2\(^\circ \) above the horizontal
  • C
    27.4 m/s at 21.2\(^\circ \) above the horizontal
  • D
    24.4 m/s at 24.2\(^\circ \) above the horizontal
    Correct
8
A batter hits a baseball so that it leaves the bat at speed \({{\rm{v}}_0}\) = 37.0 m/s at an angle a = 53.1\(^\circ \). Find the time when the ball reaches the highest point of its flight, and its height h at this time.
  • A
    3.02 s, 44.7 m
    Correct
  • B
    3.32 s, 41.7 m
  • C
    3.12 s, 43.7 m
  • D
    3.22 s, 42.7 m
9
A batter hits a baseball so that it leaves the bat at speed \({{\rm{v}}_0}\) = 37.0 m/s at an angle a = 53.1\(^\circ \). Find the horizontal range R—that is, the horizontal distance from the starting point to where the ball hits the ground
  • A
    213 m
  • B
    123 m
  • C
    134 m
    Correct
  • D
    133 m
10
A sports car has a “lateral acceleration” of 0.96g = 9.4 m \({{\rm{s}}^{ - {\rm{2}}}}\). This is the maximum centripetal acceleration the car can sustain without skidding out of a curved path. If the car is traveling at a constant 40 m/s on level ground, what is the radius R of the tightest unbanked curve it can negotiate?
  • A
    minimum radius = 180 m
  • B
    minimum radius = 170 m
    Correct
  • C
    minimum radius = 160 m
  • D
    minimum radius = 175 m
11
Passengers on a carnival ride move at constant speed in a horizontal circle of radius 5.0 m, making a complete circle in 4.0 s. What is their acceleration?
  • A
    16 m \({{\rm{s}}^{ - {\rm{2}}}}\)
  • B
    15 m \({{\rm{s}}^{ - {\rm{2}}}}\)
  • C
    2 m \({{\rm{s}}^{ - {\rm{2}}}}\)
    Correct
  • D
    14 m \({{\rm{s}}^{ - {\rm{2}}}}\)
12
You drive north on a straight two-lane road at a constant 88 km/h. A truck in the parallel lane approaches you at a constant 104 km/h. find (a) the truck’s velocity relative to you and (b) your velocity relative to the truck.
  • A
    192 km/h south direction, 192 km/h north direction
    Correct
  • B
    16 km/h south direction, 16 km/h north direction
  • C
    182 km/h south direction, 192 km/h north direction
  • D
    202 km/h south direction, 122 km/h north direction
13
An airplane’s compass indicates that it is headed due north, and its airspeed indicator shows that it is moving through the air at 240 km/h. If there is a 100-km h wind from west to east, what is the velocity of the airplane relative to the earth?
  • A
    255 km/h 26\(^\circ \) E of N
  • B
    260 km/h 23\(^\circ \) E of N
    Correct
  • C
    250 km/h 25\(^\circ \) E of N
  • D
    270 km/h 24\(^\circ \) E of N
14
An airplane’s compass indicates that it is headed due north, and its airspeed indicator shows that it is moving through the air at 240 km/h. If there is a 100-km h wind from west to east. In what direction should the pilot head to travel due north? What will be her velocity relative to the earth?
  • A
    28\(^\circ \) W of N, 210 km/h
  • B
    29\(^\circ \) W of N, 200 km/h
  • C
    25\(^\circ \) W of N, 218 km/h
    Correct
  • D
    35\(^\circ \) W of N, 198 km/h
15
A physics book slides off a horizontal tabletop with a speed of 1.10 m/s. It strikes the floor in 0.350 s. Ignore air resistance. Find the height of the tabletop above the floor
  • A
    0.600 m
    Correct
  • B
    0.700 m
  • C
    0.650 m
  • D
    0.750 m