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JEE PHYSICS MCQ: MOTION IN PLANE
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Statement-I: Minimum number of non-equal vectors in a plane required to give zero resultant is three.
Statement-II: If , then they must lie in one plane
Statement-II: If , then they must lie in one plane
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Correct option: A
Statement-I is true and statement-II is true
Option A (Statement-I is true and statement-II is true) is correct. Three non-equal vectors are needed for a zero resultant in a plane, and if the sum of vectors is zero, they must be coplanar.
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. Then, the angle between and is At the top of the trajectory of a projectile, the direction of its velocity and acceleration are A ball is thrown at an angle and another ball is thrown at an angle with the horizontal direction from the same point with velocity . The second ball reaches higher than the first ball. Find their individual heights. Take . Assertion: The drover in a vehicle moving with a constant speed on a straight road is in a non-inertial frame of reference.
Reason: A reference frame in which Newton's laws of motion are applicable is non-inertial.
Reason: For two-dimensional or three-dimensional motion, velocity and acceleration of an object works in opposite direction. and
. Then, the angle between and is At the top of the trajectory of a projectile, the direction of its velocity and acceleration are A ball is thrown at an angle and another ball is thrown at an angle with the horizontal direction from the same point with velocity . The second ball reaches higher than the first ball. Find their individual heights. Take . Assertion: The drover in a vehicle moving with a constant speed on a straight road is in a non-inertial frame of reference.
Reason: A reference frame in which Newton's laws of motion are applicable is non-inertial.
