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Class XI Physics Kinematics 4
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Question 1
A stone is thrown horizontally with a velocity of 10m/sec from some height. Find the radius of curvature of it's trajectory at the end of 3 sec after motion began
Question 2
An object is thrown at an angle α to the horizontal (0 º < α < 90 º) with a velocity. Then during ascent (ignoring air drag) the acceleration –
Question 3
A projectile is thrown with a velocity of 20 m/s, at an angle of 60 º with the horizontal. After how much time the velocity vector will make an angle of 45 º with the horizontal (in upward direction) is (take g = 10m/s2) -
Question 4
Width of a river is 60 m. A swimmer wants to cross the river such that he reaches from A to B directly. Point B is 45 m ahead of line AC (perpendicular to river). Assume that the speed of river and swimmer are equal. Swimmer must try to swim at angle θ with line AC. Value of θ is (assume that 
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) Question 5
Two particles each of mass m are moving on x-axis and y-axis with velocities 4 m/s and 6m/s respectively. Magnitude of velocity of their centre of mass is
Question 6
A projectile can have the same range R for two angles of projection. If T1 and T2 be the time of flights in the two cases, then the product of the two time of flights is directly proportional to
Question 7
A ball is thrown from a point with a speed ν0 at an angle of projection θ. From the same point and at the same instant person starts running with a constant speed ν0/2 to catch the ball. Will the person be able to catch the ball? If yes, what should be the angle of projection?
Question 8
A particle is projected with 40 m/sec making angle 60° from horizontal. Find the radius of curvature when it will make angle 30° from horizontal.
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May 7JEE & BITSAT
