Motion In A Straight Line CBSE Questions & Answers

Motion In A Straight Line

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

Questions & Answers

1
A truck has a velocity of 3 m /s at time t=0. It accelerates at 3 m / \({{\rm{s}}^{\rm{2}}}\) on seeing police .What is its velocity in m/s at a time of 2 sec
  • A
    8
  • B
    9.0
    Correct
  • C
    7
  • D
    12
2
A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. Determine the time in seconds at which the stone reaches its maximum height. g =9.8 m / \({\rm{se}}{{\rm{c}}^{\rm{2}}}\)
  • A
    2.04
    Correct
  • B
    2.8
  • C
    1.67
  • D
    2.7
3
A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. Determine the maximum height it travels in meters. g =9.8 m / \({\rm{se}}{{\rm{c}}^{\rm{2}}}\)
  • A
    25.4
  • B
    15.4
  • C
    20.4
    Correct
  • D
    30.4
4
A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. Determine the time in seconds at which the stone returns to the height from which it was thrown. g =9.8 m / \({\rm{se}}{{\rm{c}}^{\rm{2}}}\)
  • A
    4.44
  • B
    4.08
    Correct
  • C
    3.45
  • D
    5.32
5
A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. Determine the velocity in m/sec when the stone returns to the height from which it was thrown. g =9.8 m / \({\rm{se}}{{\rm{c}}^{\rm{2}}}\)
  • A
    -25.0
  • B
    -30.0
  • C
    -15.0
  • D
    -20.0
    Correct
6
A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. The height of the building is 50.0 m. determine the velocity in m/sec when the stone hits the ground. g =9.8 m / \({\rm{se}}{{\rm{c}}^{\rm{2}}}\)
  • A
    -33.8
  • B
    -37.1
    Correct
  • C
    -39.7
  • D
    -27.4
7
Two parallel rail tracks run north-south. Train A moves north with a speed of 54 km/ hr, and train B moves south with a speed of 90 km/ hr. What is the velocity of B with respect to A in m/sec? Choose the positive direction of x-axis to be from south to north.
  • A
    -45
  • B
    -40.0
    Correct
  • C
    -30
  • D
    -55
8
Two parallel rail tracks run north-south. Train A moves north with a speed of 27 km/ hr, and train B moves south with a speed of 45 km/ hr. What is the velocity of B with respect to A in m/s? Choose the positive direction of x-axis to be from south to north.
  • A
    -20.0
    Correct
  • B
    -18
  • C
    -28
  • D
    -15
9
Two parallel rail tracks run north-south. Train A moves north with a speed of 54 km/ hr, and train B moves south with a speed of 90 km/ hr. What is the velocity of ground with respect to B in m/s? Choose the positive direction of x-axis to be from south to north.
  • A
    25.0
    Correct
  • B
    22
  • C
    30
  • D
    28
10
Two parallel rail tracks run north-south. Train A moves north with a speed of 54 km/ hr, and train B moves south with a speed of 90 km/ hr. What is the velocity of a monkey running on the roof of the train A against its motion (with a velocity of 18 km/hr with respect to the train A) as observed by a man standing on the ground in m/s ? Choose the positive direction of x-axis to be from south to north.
  • A
    10.0
    Correct
  • B
    8
  • C
    14
  • D
    12
11
Two parallel rail tracks run north-south. Train A moves north with a speed of 54 km/ hr, and train B moves south with a speed of 90 km/ hr. What is the velocity of a monkey running on the roof of the train A against its motion (with a velocity of 36 km/hr with respect to the train A) as observed by a man standing on the ground in m/s ? Choose the positive direction of x-axis to be from south to north
  • A
    3
  • B
    5.0
    Correct
  • C
    11
  • D
    8
12
A jet lands on an aircraft carrier at 63 m/s. What is its acceleration in \({\rm{m}}/{{\rm{s}}^{\rm{2}}}\) if it stops in 2.0 s?
  • A
    -31.0
    Correct
  • B
    -33
  • C
    -35
  • D
    34
13
A jet lands on an aircraft carrier at 63 m/s. What is the displacement of the plane in m while it is stopping?
  • A
    68
  • B
    57
  • C
    63.0
    Correct
  • D
    60
14
A car traveling at a constant speed of 45.0 m/s passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard; the trooper sets out from the billboard to catch it, accelerating at a constant rate of 3.00 \({\rm{m}}/{{\rm{s}}^{\rm{2}}}\). How long does it take her to overtake the car?
  • A
    33.0 s
  • B
    31.0 s
    Correct
  • C
    34.0 s
  • D
    36.0 s
15
Jules Verne in 1865 proposed sending people to the Moon by firing a space capsule from 220-m-long cannon with a final velocity of 10.97 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch?
  • A
    \(3.74{\rm{ \times }}?10{?^{(5)}}m/s2\)
  • B
    \(2.74{\rm{ \times }}?10{?^6}m/s2\)
  • C
    \(2.74{\rm{ \times }}?10{?^{(5)}}m/s2\)
    Correct
  • D
    \(2.74{\rm{ \times }}?10{?^{(3)}}m/s2\)