Motion in a Plane Easy Questions and Answers

Since displacement is along the y-direction, hence displacement s^{^→} = 10ĵ .
Work done = F^{^→} . s^{^→}
= (-2î + 15ĵ + 6k̂) . 10ĵ = 150 J

Correct Option: C

Since displacement is along the y-direction, hence displacement s^{^→} = 10ĵ .
Work done = F^{^→} . s^{^→}
= (-2î + 15ĵ + 6k̂) . 10ĵ = 150 J

Note that (B^{^→} × A^{^→}) ⊥ A^{^→} . Hence their dot product is zero.

Correct Option: B

Note that (B^{^→} × A^{^→}) ⊥ A^{^→} . Hence their dot product is zero.

(A^{^→} + B^{^→})² = (C^{^→})²
⇒ A² + B² + 2 A^{^→}.B^{^→} = C²
⇒ 3² + 4² + 2 A^{^→}.B^{^→} = 5²
⇒ 2 A^{^→}.B^{^→} = 0
⇒ A^{^→}.B^{^→} = 0
∴ A^{^→} ⊥ B^{^→}
Here A² + B² = C².
Hence, A^{^→} ⊥ B^{^→}

Correct Option: A

When a vector is multiplied with a scalar, the result is a vector.

Correct Option: C

When a vector is multiplied with a scalar, the result is a vector.

Motion in a Plane

Motion in a Plane

Mechanics

Correct Option: C

Correct Option: B

Correct Option: A

Correct Option: C

Correct Option: C