1. What is the time period of the pendulum if a pendulum takes 52s to complete 10 oscillations.
1. What is the time period of the pendulum if a pendulum takes 52s to complete 10 oscillations.
Answer:
Time taken for completing 10 oscillations = 52 s
Time taken for completing 1 oscillation = 52/10 s =5.2s
Time taken to complete 1 oscillation is time period of pendulum is 5.2 seconds.
2.Calculate the speed of the train if a train takes 5 hours to cover the distance 280 km between two stations.
2.Calculate the speed of the train if a train takes 5 hours to cover the distance 280 km between two stations.
Answer:
Distance between two stations = 280 km
Time taken to cover the distance= 5 hours
Speed =Distance travelled/time taken = 280km/5 hammer
=56 km/h
Hence,Speed of train =56 km/h
3.The odometer reading of a car is 57325.0 km when the time 08:40 AM.Calculate the distance moved by the car at 08:45 AM, the odometer reading changes to 57338.0 km? Find the speed of the car in km/min for this time. Note the speed in km/h.
3.The odometer reading of a car is 57325.0 km when the time 08:40 AM.Calculate the distance moved by the car at 08:45 AM, the odometer reading changes to 57338.0 km? Find the speed of the car in km/min for this time. Note the speed in km/h.
Answer
Distance = 57338.0 km – 57325 km =13 km
Speed in km/min =13km/5 min = 2.6 km/min
Speed in km/hr =13 km/1/12 hr
=(13 x 12) km/hr
=156 km/hr.
4.16 minutes of time is taken by Naina to reach her school from her house on bycycle. Calculate the distance between house and school if bicycle has a speed of 3 m/min.
4.16 minutes of time is taken by Naina to reach her school from her house on bycycle. Calculate the distance between house and school if bicycle has a speed of 3 m/min.
Answer:
Time taken to reach school =16 min
Speed of the bycycle = 3 m/min .
Distance = speed x time = 3 x 16 = 48 m
Distance between the Naina’s school and house is 48 m.
5.Characterize the accompanying as movement along a straight line, roundabout or oscillatory movement. Running with your hands in the air.
5.Characterize the accompanying as movement along a straight line, roundabout or oscillatory movement. Running with your hands in the air.
Answer:
Oscillatory motion During running, the hands move to and fro, and after a certain amount of time, this motion is repeated. As a result, it is a motion that oscillates.
6. A horse cart moving along a straight road.
6. A horse cart moving along a straight road.
Answer:
straight line motion As the horse cart moves along a straight road. As a result, motion follows a straight line.
7. A child on a merry-go-round moving.
7. A child on a merry-go-round moving.
Answer:
Circular motion
Movement of the carousel is round. As a result, the circular motion is experienced by children sitting inside.
8. A child swinging on a see-saw.
8. A child swinging on a see-saw.
Answer:
Oscillatory motion ,when the see-saw keeps going up and down. As a result, it is a motion that oscillates.
9.The movement of an electric bell's hammer.
9.The movement of an electric bell's hammer.
Answer:
Oscillatory motion
The bell begins to vibrate when the hammer strikes it. It is an illustration of motion that oscillates.
10.A train moving along a straight bridge.
10.A train moving along a straight bridge.
Answer:
Straight line motion ,The train is traveling along the straight bridge. It shows how a straight line moves.
11.Which of the following is false? A second is the fundamental unit of time.
11.Which of the following is false? A second is the fundamental unit of time.
Answer:
Correct.
SI unit of time is second.
12. Every thing moves at the same speed.
12. Every thing moves at the same speed.
Answer:
Not accurate.
The object's speed is either constant or variable.
13. Kilometers are used to measure distances between cities.
13. Kilometers are used to measure distances between cities.
Answer:
Correct.
There is a significant distance between the two cities. Additionally, since a kilometer is a larger unit, it is utilized to measure the distance between cities.
14. A particular pendulum's duration is not constant.
14. A particular pendulum's duration is not constant.
Answer:
Not right.
The duration is determined by the thread's length. As a result, it will remain constant for a specific pendulum.
15. A train's speed is measured in meters per hour.
15. A train's speed is measured in meters per hour.
Answer:
Not accurate.
The train's speed can be measured in km/h or m/s.
16..Describe the form of the motion's distance-time graph in the following scenarios: i) A vehicle traveling at a constant speed
16..Describe the form of the motion's distance-time graph in the following scenarios: i) A vehicle traveling at a constant speed
Answer:
A car traveling at the same speed covers the same distance over the same amount of time. The motion will be uniform.
The distance-time graph will look like this:
17.A car parked off to the side of a road.
17.A car parked off to the side of a road.
Answer:
A vehicle left on a street there is no adjustment of the distance with the time. No motion As a result, the final graph will be parallel to the x-axis.
The distance-time graph will look like this:
