KinematicsMotion in a Plane (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 11  15 of 15
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Question number: 11
» Kinematics » Motion in a Plane
Question
The height y and the distance x along the horizontal at plane of the projectile on a certain planet (with no surrounding atmosphere) are given by y = (8t  5t2) metre and x = 6t metre where t is in second. The velocity with which the projectile is projected is
Choices
Choice (4)  Response  

a.  6 m/s 

b.  8 m/s 

c.  10 m/s 

d.  Data is insufficient 

Question number: 12
» Kinematics » Motion in a Plane
Question
A projectile is thrown at an angle 0 and (90°  0) from the same point with same velocity 98 m/s. The heights attained by them, if the difference of heights is 50 m will be (in m)
Choices
Choice (4)  Response  

a.  270, 220 

b.  200, 150 

c.  250, 200 

d.  300, 250 

Question number: 13
» Kinematics » Motion in a Plane
Question
A particle is moving in a plane with a velocity given by, u = u0 i + (∞a cos ∞t) j, where i and j are unit vectors along x and yaxes respectively. If the particle is at the origin at t = 0, then its distance from the origin at time t = 3π/2∞ will be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 14
» Kinematics » Motion in a Plane
Question
When the angle of elevation of a gun are 60° and 30° respectively, the height it shoots are h1 and h2 respectively, hj/h2 equal to –
Choices
Choice (4)  Response  

a.  1/3 

b.  2/1 

c.  1/2 

d.  3/1 

Question number: 15
» Kinematics » Motion in a Plane
Question
A man whirls a stone round his head on the end of a string 4.0 metre long. Can the string be in a horizontal, plane? If the stone has a mass of 0.4 kg and the string will break, if the tension in it exceeds 8 N. The smallest angle the string can make with the horizontal and the speed of the stone will respectively be (Take g = 10 m/sec ^{2})
Choices
Choice (4)  Response  

a.  45°, 8.2 m/s 

b.  60°, 7.7 m/s 

c.  60°, 8.7 m/s 

d.  30°, 7.7 m/s 
