Class 7 Motion And Time CBSE Questions & Answers

Class 7 · Motion And Time

This is Science Class 7 Motion and Time CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Odometer reading at the start of journey was 1250 km and after 2 hours its reading changes to 1400 km. The average speed of the vehicle for this journey is
  • A
    75 km/h
    Correct
  • B
    50 km/h
  • C
    100 km/h
  • D
    80 km/h
2
A body covers 50 m in first 2 second, 50 m in next 2 second and 100 m in next 4 seconds. The speed of the body is
  • A
    Uniform speed
    Correct
  • B
    First non-uniform than uniform
  • C
    Non-uniform speed
  • D
    First uniform than non-uniform
3
A bus covers a distance of 120 m in 1 minute. Its average speed in m/s is
  • A
    60 m/s
  • B
    10 m/s
  • C
    120 m/s
  • D
    2 m/s
    Correct
4
Watch used to measure short interval of time is
  • A
    Quartz watch
  • B
    Atom watch
  • C
    Pendulum watch
  • D
    Stop watch
    Correct
5
Speed time graph is straight line for
  • A
    Constant motion Uniform motion
  • B
    Accelerated motion
  • C
    Uniform motion
    Correct
  • D
    Non-uniform motion
6
Speed of light in air is about 300000 km/s. How much distance will it travel in 5 second?
  • A
    \({\text{15}}0{\text{ }} \times {\text{ 1}}{0^{\text{9}}}\) m/s
  • B
    \({\text{3 }} \times {\text{ 1}}{0^{\text{8}}}\) m/s
  • C
    \({\text{15 }} \times {\text{ 1}}{0^{\text{9}}}\) m/s
  • D
    \({\text{1}}.{\text{5 }} \times {\text{ 1}}{0^{\text{9}}}\) m/s
    Correct
7
A body is said to be in state of rest if it
  • A
    Does not change its position with time
    Correct
  • B
    Moves with equal speed to other moving body
  • C
    Change its position with time
  • D
    Moves very slowly with time
8
Select the incorrect statement from the following.
  • A
    Speed is a scalar quantity
  • B
    Speed of car on road is always uniform
    Correct
  • C
    Speed of car is not uniform due to traffic
  • D
    Speed of a moving body never be zero
9
How much time a car will take to cover 200 km at a speed of 40 km/h?
  • A
    5 h
    Correct
  • B
    8 h
  • C
    4 h
  • D
    10 h
10
A simple pendulum complete 150 oscillations in 30 s. The frequency of the pendulum is
  • A
    5 Hz
    Correct
  • B
    10 Hz
  • C
    3 Hz
  • D
    20 Hz
11
Speed is the ratio of
  • A
    Area covered to the time
  • B
    Time taken to the distance traveled
  • C
    Distance traveled to the time taken
    Correct
  • D
    Mass of the body to the time taken
12
A passenger is sitting in a moving train the person is
  • A
    Neither in state of rest nor in state of motion
  • B
    In state of motion as well as in state of rest
    Correct
  • C
    In state of rest
  • D
    In state of motion
13
State of rest or motion is always compared with
  • A
    Position of the body in vehicle
  • B
    Other body in surrounding
    Correct
  • C
    Position of the car wheels
  • D
    Position of observer
14
The device shown below is a part of dashboard of car. It shows
Question 14 figure 1
  • A
    Speedometer
  • B
    Both odometer and speedometer
    Correct
  • C
    Neither speedometer nor odometer
  • D
    Odometer
15
A car traveled at the speed of 50 km/h for 30 minute and than at a speed of 80 km/h for 45 minute. The total distance covered by car is equal to
  • A
    85 km
    Correct
  • B
    90 km
  • C
    77 km
  • D
    130 km