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JEE PHYSICS MCQ: MOTION IN PLANE
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Medium
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Understanding
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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: When a body is projected at an angle it's range is maximum.
Reason R: For maximum range, the value of should be equal to one.
In the light of the above statements, choose the correct answer from the options given below:
Assertion A: When a body is projected at an angle it's range is maximum.
Reason R: For maximum range, the value of should be equal to one.
In the light of the above statements, choose the correct answer from the options given below:
View answer and explanation
Correct option: C
Both A and R are correct and R is the correct explanation of A
Option C (Both A and R are correct and R is the correct explanation of A) is correct because the maximum range of a projectile occurs at 45 degrees, which is when sin(2θ) = 1.
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Given, The angle between is
Assertion: The necessary condition for motion in two dimensions, velocity and acceleration vectors should have any angle between and between them.
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.
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.