Question

3. A simple pendulum takes 32 s to complete 20 oscillations. What is the
time period of the pendulum?
4. The distance between two stations is 240 km. A train takes 4 hours to
cover this distance. Calculate the speed of the train.
5. The odometer of a car reads 57321.0 km when the clock shows the time
08:30 AM. What is the distance moved by the car, if at 08:50 AM, the
odometer reading has changed to 57336.0 km? Calculate the speed of
the car in km/min during this time. Express the speed in km/h also.
6. Salma takes 15 minutes from her house to reach her school on a
bicycle. If the bicycle has a speed of 2 m/s, calculate the distance
between her house and the school.
7. Show the shape of the distance-time graph for the motion in the
following cases:
(i) A car moving with a constant speed.
(ii) A car parked on a side road.
8. Which of the following relations is correct?
Distance
(i)
e
Speed = Distance X Time
(ii) Speed
Time
1
Time
Speed =
Distance
(iv) Speed
Distance x Time​

Answer 1

3. 1.6s

4. 60km/hr

5. at 8:30 AM-

Therefore, the distance traveled by car =15 km.

6. Time taken =15 min

Speed =2 m/min

7. (i) A car moving with a constant speed covers equal distance in equal intervals of time. It will be a uniform motion.

(ii) A car parked on a road there is no change in the distance with the time. No motion.

Therefore the graph so obtained will be parallel to x-axis.