Unit Revision PQ10

Q and A

Q1

Q2

Q3

Q3 continued

Q4

Q5 A horizontal force of 140 N is needed to pull a 60 kg box across the horizontal floor at constant speed. What is the value of the force opposing motion?

Q5 continued

Q6

Q7

Q8

Q9

Q10 Three blocks masses 2kg, 3kg and 5kg are connected to each other with light strings and are then placed on a smooth frictionless surface. See fig. below. Let the system be pulled with a force F from the side of lighter mass so that it moves with an acceleration of 1ms-2. T1 and T2 denote the tensions in the strings. Calculate the value of T1 and T2.

Q10 continued