None
A stone of mass 1kg is tied to the end of the string 1m long. It is whorled in a horizontal circle with the speed of 4m/s then the centripetal force (in N) provided by the string is :
16
10
20
8
Calculate the acceleration of block of the following diagram. Assume all surfaces are frictionless . Here m1 = 100kg and m2 = 50kg

0.33m/s2
0.66m/s2
1m/s2
1.32m/s2
The coefficent of friction between tyers and road is 0.5. The maximum speed (in m/s) with which a car be driven round a curve a radius of 20m without skidding is [ g = 10m/s2]
10
40
15
20