Per NCERT §5.1.1 (scalar product), A · B equals which expression?
AA B (no factor)
BA B cos θ
CA B sin θ
DA B tan θ
Answer & Solution
Correct answer: B. A B cos θ
NCERT §5.1.1: scalar (dot) product A · B = AB cos θ. Maximum at θ = 0; zero at θ = 90°.
Related questions
A carrom coin elastically collides head-on with another identical coin at rest. After collA delivery boy raises a $10$ kg sack to a $2$ m shelf in $4$ s. The power expended (using A cricket ball of mass $0.15$ kg moves at $20$ m/s. Its kinetic energy is:A porter carries a $20$ kg bag horizontally for $50$ m at constant height. The work done bPer NCERT §5.1.1 (Summary 7), the scalar product is which property algebraically?Per NCERT §5.4, the dimensions of kinetic energy (and of work) are which?Per NCERT Example 5.4, a bullet of mass 50 g at 200 m/s emerges from plywood with 10% of iPer NCERT §5.4, the kinetic energy is which kind of quantity?