Horizontal Blocks in Contact – Practice
Questions:
1) In the diagram below, there are two boxes with masses of 5kg and 15kg. A force of 100N acts on the boxes to the right.
Calculate the following:
a) the acceleration of the boxes:
b) the force acting on each of the boxes:
c) the reaction force of the 15kg box on the 5kg box:
2) In the diagram below, there are three boxes with masses of 10kg, 5kg and 12kg. A force of 135N acts on the boxes to the right.
Calculate the following:
a) the acceleration of the boxes:
b) the net force acting on the 5kg box:
c) the reaction force of the 5kg box on the 10kg box:
Quick Answers:
1) a) 5 m/s2 b) F5 = 25N right, F15 = 75N right c) 75N left
2) a) 5 m/s2 b) 25N right c) 85N left
Worked Answers: