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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
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

3 6125
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

12 6119
Q:

STEP is the abbreviated name of the welfare programme to help

A) Children B) Woman
C) Farmers D) Senior citizens
 
Answer & Explanation Answer: B) Woman

Explanation:
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Filed Under: Indian Economy

15 6115
Q:

What kind of attempts is made by individuals to obtain confidential information from a person by falsifying their identity  ?

A) Spyware scams B) Phishing scams
C) Computer viruses D) None
 
Answer & Explanation Answer: B) Phishing scams

Explanation:
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Filed Under: Computer
Job Role: Bank Clerk

15 6111
Q:

What is Abell 370, whose picture was recently shared by the NASA?

 

A) Black hole B) Exoplanet
C) Galaxy Cluster D) Meteor
 
Answer & Explanation Answer: C) Galaxy Cluster

Explanation:
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Filed Under: General Science
Exam Prep: Bank Exams

1 6110
Q:

 What is the full form of GSLV ?

A) Ground Satellite Launching Vehicle B) Geosynchronous Satellite Launching Vehicle
C) Gravity synchronous Launching Vehicle D) Group satellite Launching vehicle
 
Answer & Explanation Answer: B) Geosynchronous Satellite Launching Vehicle

Explanation:
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Filed Under: General Awareness

10 6108
Q:

Rearrange the parts of the sentence in correct order.

 

The maximum

 

P : condition is called its infiltration capacity

Q : rate at which water enters

R : into the soil in a given

 

A) PQR   B) QPR  
C) QRP   D) RQP
 
Answer & Explanation Answer: C) QRP  

Explanation:
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Filed Under: English
Exam Prep: Bank Exams , GRE , TOEFL

0 6107
Q:

Who became the fastest bowler to get to 250 wickets in the test matches ?

A) K. Rabada B) R. Ashwin
C) T G Southee D) Jadeja
 
Answer & Explanation Answer: B) R. Ashwin

Explanation:

Indian Cricket team off-spin specialist Ravichandran Ashwin has become the fastest cricketer to take 250 wickets in the Test matches. Ashwin surpassed Australian fast bowler Dennis Keith Lillee to reach the milestone of 250 Test wicket. Thus Ravichandran Ashwin has become the sixth Indian bowler to reach 250 test wickets.

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Filed Under: Sports
Exam Prep: CAT , Bank Exams
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12 6106