Question

Blocks a and b are connected by a bar of negligible weight calculate force on bar

Answer 1

Answer:

blocks a and b E are connected by a bar of negligible weight then we can calculate force by using formula

Answer 2

Answer:

well the question is incomplete.....answer is 150 N

Explanation:

If the plane as an angle θ with horizontal then can θ=8/15 If R is the normal.

R=170kgcosθ=170×10×(1517)=1500N

Force of friction on A=1500×0.2=300N

Force of friction on B=1500×0.4=600N

Considering the two blocks as a system the netforce paraller to the plane is

=2×170gsinθ−300−600=1600−900=700N

Acceleration =700340=3517ms−2

Consider the motion of A along

170gsinθ−300−P=P 170×3517(where P is pull on the bar)

P=500−350= 150 N