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A crane stands on a level ground. It is ...

A crane stands on a level ground. It is represented by a tower ABCD, of height 11 m and a jib BR. The ib is of length 20 m and can rotate in a vertical plane about B.A vertical cable, RS, carries a load S. the diagram shows current position of the jib, cable and load.


The length BS is

A

8 m

B

12 m

C

13.9 m

D

17.9 m

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A crane stands on a level ground. It is represented by a tower ABCD, of height 11 m and a jib BR. The Jib is of length 20 m and can rotate in a vertical plane about B.A vertical cable, RS, carries a load S. the diagram shows current position of the jib, cable and load. The measure of the angles BRS, is

A crane stands on a level ground. It is represented by a tower ABCD of height 11 m and BR. The ib is of length 20 m and can rotate in a vertical plane about B.A vertical cable, RS, carries a load S. the diagram shows current position of the jib, cable and load. The angle that the jib, BR, makes with the horizontal, is

Knowledge Check

  • A weightless rod of length 2l carries two equal masses 'm', one tied at lower end A and the other at the middle of the rod at B . The rod can rotate in vertical plane about a fixed horizontal axis passing thriugh C . The rod of is released from rest in horizontal possion. The speed of the mass B at the instant rod become vertical is:

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    B
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