1.    Classification of motion

(i) Oscillatory motion

(ii) Straight line

(iii) Circular motion

(iv) Oscillatory motion

(v) Oscillatory motion

(vi) Straight line.

2.    (ii), (v).

3.    Time taken for 20 oscillation = 32 s

Time taken for 1 oscillation = 32s/20.

Time period = 1.6 s

4.   Distance = 240 km

Time = 4 h

Speed = distance/time

= 240 km/4 h

= 60 km/h

5.    Odometer reading at 8.30 AM = 57321.0 km

Odometer reading at 8.50 AM = 57336.0 km

Distance travelled = 15 km

Time taken = 20 min.

Speed = distance / time

= 15 km/20 min.

= 0.75 km/h = 0.75 × 60 = 45 km/h.

6.   Speed = 2 m/s

Time = 15 min = 15 × 60 s = 900 s.

Distance travelled = speed × time

2 × 900 s = 1800 m = 1.8 km.

7.   

8.    

9.     (iv) m/s.

10.   (ii) 25 km

11.    Speed = 100 m/10s = 10 m/s

12.    A

13.   (iii).