1) Assume that same ball is thrown at two angles 50o and 80o from the ground with initial velocity of 12 m/s.
(1) At which angle ball covers the maximum distance?
(2) What is the maximum distance covered by the ball?
a. 50 o, 14.45 m
b. 50 o, 11.24 m
c. 80 o, 50.33 m
d. 80 o, 16.26 m
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Answer
Explanation
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ANSWER: 50o, 14.45 m
Explanation:
No explanation is available for this question!
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2) A stone undergoes projectile motion when thrown from top of the building. If it strikes the ground surface at a distance away from the building then its horizontal direction is __________
a. less than range
b. more than range
c. same as range
d. unpredictable
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Answer
Explanation
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ANSWER: more than range
Explanation:
No explanation is available for this question!
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3) Which of the following formulae is used determine the time of flight for projectile motion, when point of projection and point of landing are on same level of horizontal plane?
a. (2u sin α) / g
b. (u 2 sin α) / 2g
c. (2u sin α) / g cos θ
d. 2ug sin α
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Answer
Explanation
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ANSWER: (2u sin α) / g
Explanation:
No explanation is available for this question!
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4) A ball is thrown on an inclined surface PQ with a velocity of 50 m/s. What is the range on the plane if the ball is thrown in upward direction? ( θ = 20o, α = 35o)
a. 159.32 m
b. 200.12 m
c. 218.89 m
d. 221.31 m
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Answer
Explanation
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ANSWER: 218.89 m
Explanation:
No explanation is available for this question!
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5) What is the momentum of a body of 2 kg at its highest point, when thrown with a velocity of 15 m/s at an angle of of 70o with the horizontal?
a. 9.23 kg ms -1
b. 10.26 kg ms -1
c. 28.19 kg ms -1
d. None of the above
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Answer
Explanation
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ANSWER: 10.26 kg ms-1
Explanation:
No explanation is available for this question!
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6) In projectile motion, which of the following factors affecting the actual path of motion are neglected?
a. Curvature of earth
b. Rotation of earth
c. Wind resistance
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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7) The angle of projection is 76o over a horizontal plane, if horizontal range (R) is equal to ________
a. maximum height (H max)
b. 4 maximum height (H max)
c. √3 maximum height (H max)
d. 4√3 maximum height (H max)
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Answer
Explanation
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ANSWER: maximum height (Hmax)
Explanation:
No explanation is available for this question!
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8) What is the angle of projection for a bullet fired over a horizontal plane, when horizontal range is equal to 4 times the maximum height?
a. 30 o
b. 45 o
c. 76 o
d. 90 o
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Answer
Explanation
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ANSWER: 45o
Explanation:
No explanation is available for this question!
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9) What is the kinetic energy at the highest point, if at an angle of 30o with the horizontal a ball is projected with a kinetic energy E?
a. E / 2
b. E / √2
c. 5E / 4
d. 3E / 4
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Answer
Explanation
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ANSWER: 3E / 4
Explanation:
No explanation is available for this question!
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10) What is the minimum velocity attained by a ball thrown with velocity of 20 m/s at an angle of 40o with the horizontal?
a. 15.32 m/s
b. 12.85 m/s
c. 16.78 m/s
d. None of the above
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Answer
Explanation
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ANSWER: 15.32 m/s
Explanation:
No explanation is available for this question!
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