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গরম বাতাসে পরিপূর্ণ M ভরের একটি বেলুন (থ্রডি সহ) পৃথিবীর দিকে খুব ত্বরণ a তে নেমে আসছে। ঝুড়ি থেকে কি পরিমান m ভর ফেলে দিলে বেলুনটি উপরের দিকে একই খুব ত্বরন a- তে উঠে যাবে ? সকল ক্ষেত্রে বেলুনটির আয়তন একই ছিল বলে ধরে নেওয়া হলো। (g = অভিকর্ষীয় ত্বরন)(A hot air balloon with a bucket is descending towards the earth with a constant acceleration a. The combined mass of the balloon and bucket is M. What mass m from the bucket should be released so that the balloon starts ascending up with the same acceleration a? Consider the volume of the balloon remains constant at all the time. (g=acceleration due to gravity))
A m=2ag+aM
B m=g+a2M
C m=2ag M
D m=M2a(g+a)
E m=ag+M
The rated loads of lifting cranes, as percentage of tipping load at specified radius, for crawler-mounted and pneumatic tyre-mounted machines would be respectively
A 80 and 90
B 90 and 80
C 85 and 75
D 75 and 83
An empty bucket being filled with paint at a constant rate takes 6 min to be filled to 7/10 of its capacity. How much more time will it take to fill the bucket to full capacity?
A 18/7
B 20/7
C 20/14
D 18/14
A tank that was 10% full was emptied into a 50-litre bucket.If the oil now fills 40% of the bucket’s volume. Then what is half of the capacity of the tank in liters?
A 50 liters
B 100 liters
C 150 liters
D 200 liters
An empty bucket being filled with paint at a constant rate takes 6 minutes to be filled to 710 of its capacity. How much more time will it take to fill the bucket to full capacity?
A 2 minutes
B 3 minutes
C 2 and 42 minutes
D 8 and 47 minutes
There are two buckets, smaller bucket can hold only 3/5th of the water as compared to the larger bucket. If 6,000 buckets of larger capacity are needed to fill a pond. Then how many smaller capacity buckets are needed to fill the same pond?
A 8000
B 10000
C 12000
D 15000
12 buckets of water fill a tank when the capacity of each bucket is 13.5 litres. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 9 litres?
A 8
B 15
C 16
D 18
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will
A increase
B decrease
C remain same
D increase/decrease depending on depth of immersion
stand next to the lamppost and face west ,walk 20 yards and then turn 90 degrees clockwise. Walk another 10 yards and then turn 45 degrees anticlockwise. Walk another 15 yards, reverse you direction and walk 5 yards back. Turn 135 degrees clockwise and walk another 10 yards . In which direction are you now facing?
A West
B East
C South
D North
"It has a gauge that tells you when you are running low on gases"Which pair fits to label the (gauge,low) parts of the sentence?
A adjective,adverb
B noun,adverb
C noun,adjective
D adjective,adjective

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