Related Questions

A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?
A Depends on their masses
B Sphere
C Disk
D Both reach at the same time
A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if
A The sum of the two masses is equal to the total mass of body
B The center of gravity of the two masses coincides with that of the body
C The sum of mass moment of inertia of the masses about their center of gravity is equal to the mass moment of inertia of the body
D All of the above
স্থির অবস্থায় থাকা একটি বস্তু বিস্ফরিত হয়ে m1 ও m2 ভরের দুইটি বস্তুতে পরিণত হয়ে যথাক্রমে v1 ও v2 বেগে বিপরীত দিকে চলমান। v1v2 এর অনুপাত কত? (A body initially at rest, exploded into two objects of masses m1 and m2 which are moving apart in opposite direction with speeds v1 and v2 respectively. What is the ratio v1v2?)
A m1m2
B m2m1
C -m2m1
স্থির অবস্থায় থাকা একটি বস্তু বিস্ফোরিত হয়ে m1 ও m2 ভরের দুইটি বস্তুতে পরিণত হয়ে যথাক্রমে v1 ও v2 বেগে বিপরীত দিকে চলমান। v1v2 এর অনুপাত কত? ( A body initially at rest, exploded into two objects of masses m and m which are moving apart in opposite direction with speeds v and v respectively. What is the ratio v1v2
A m1m2
B m2m1
C −m2m1
D m2m1
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If the maximum number of valves that can be closed at the same time are closed which of the following must true?
A R is open
B S is open
C T is open
D Z is open
The rainfall due to upward movement of air caused by convergence of cold air masses against warm air masses is called ________.
A Cyclonic rainfall
B Orographic rainfall
C Frontal rainfall
D Convectional rainfall
An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's
A First law
B Second law
C Third law
D Fourth law
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
A $$\frac{\tau }{2}$$
B $$\tau $$
C $$2\tau $$
D $$4\tau $$
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If R is closed and U is open, which of the following must be true?
A S is open
B T is open
C T is closed
D Y is closed
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If Z is open, which of the following must be true?
A S is open
B T is open
C U is open
D y is open

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