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Q:

A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height?

A) 2.87 sec B) 3.44 sec
C) 4.65 sec D) 5.41 sec
 
Answer & Explanation Answer: B) 3.44 sec

Explanation:

It is launched vertically with an initial speed of 110 ft/sec.

It will reach maximum height when the speed drops to 0.

Vo=110 feet per second 

ho=2 feet 

So, h(t) = -16t^2 +110t +2 

Take the derivative: h'(t) = 110 -32t 

The maximum height will be at the inflection when the derivative crosses the x-axis, then h'(t)=0. 

So, set h'(t)=0 and solve for t: 

0 = 110 -32t 

-110 = -32t 

t=3.4375 

t=3.44 seconds.

 

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Filed Under: Physics
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Q:

When you travel in certain parts of India, you will  notice red soil. What is the main reason for this colour?

A) Abundance of magnesium B) Accumulated humus
C) Presence of ferric oxides D) Abundance of Phosphates
 
Answer & Explanation Answer: C) Presence of ferric oxides

Explanation:
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Filed Under: Indian Geography

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Q:

Israel’s Rafael Defense Systems ltd has formed a joint venture with ________ to produce anti-tank guided missiles for the Indian armed forces.

A) Goa Shipyard B) Hindustan Aeronautics Limited
C) Kalyani Group D) Hindustan Aeronautics Limited
 
Answer & Explanation Answer: C) Kalyani Group

Explanation:
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Filed Under: General Awareness
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Q:

The Sarvodaya Movement was started by

A) Vinoba Bhave B) Bal Gangadhar Tilak
C) Mahatma Gandhi D) Vivekananda
 
Answer & Explanation Answer: A) Vinoba Bhave

Explanation:

The Sarvodaya Movement was started by Vinoba Bhave on 18 April 1951 at Pochampally village in Nalgonda district who was directly influenced by Gandhi. 

 

The_Sarvodaya_Movement_was_started_by1557121966.jpg image

 

The meaning of Sarvodaya is a combination of two words Sarva meaning one and all, and Uday meaning welfare or uplift. Thus it implies Universal uplift or welfare of all as.

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Filed Under: Indian History
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Q:

Which of the following features may occur when lava cool at the surface

A) Basalt plateau B) Still
C) Batholith D) Dyke
 
Answer & Explanation Answer: A) Basalt plateau

Explanation:
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Filed Under: World Geography

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Q:

Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?

A) Golf tee B) Motorboat
C) Water skis D) Hang glider
 
Answer & Explanation Answer: C) Water skis

Explanation:
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Filed Under: Inventions

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Q:

In 1930, which leader started the Red Shirt Movement in the North West Frontier Province?

Answer

Khan Abdul Ghaffar Khan

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Subject: General Awareness

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Q:

The third vehicle in Buddhism was Known as

A) Mahasanghika B) Zen
C) Vajrayana D) None of these
 
Answer & Explanation Answer: C) Vajrayana

Explanation:
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Filed Under: Indian History

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