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Recent questions tagged jeemain-2016 physics set c 10042016

A bottle has an opening of radius $a$ and length $b$. A cork of length $b$ and radius $(a + \Delta a)$ where is $(\Delta << a)$ is compressed to fit into the opening completely (See figure). If the bulk modulus of cork is $B$ and frictional coefficient between the bottle and cork is $\mu$ then the force needed to push the cork into the bottle is :

asked May 23, 2017 by priyanka.c

1 answer

An astronaut of mass $m$ is working on a satellite orbiting the earth at a distance $h$ from the earth’s surface. The radius of the earth is $R$, while its mass is $M$. The gravitational pull $F_G$ on the astronaut is

asked May 22, 2017 by priyanka.c

1 answer

In the figure shown ABC is a uniform wire. If centre of mass of wire lies vertically below point A, then $\frac{BC}{AB}$ is close to :

asked May 22, 2017 by priyanka.c

1 answer

Velocity-time graph for a body of mass 10 kg is shown in figure. Work-done on the body in first two seconds of the motion is :

asked May 22, 2017 by priyanka.c

1 answer

Concrete mixture is made by mixing cement, stone and sand in a rotating cylindrical drum. If the drum rotates too fast, the ingredients remain stuck to the wall of the drum and proper mixing of ingredients does not take place. The maximum rotational speed of the drum in revolutions per minute(rpm) to ensure proper mixing is close to : </br> (Take the radius of the drum to be 1.25 m and its axle to be horizontal) :

asked May 22, 2017 by priyanka.c

1 answer

A particle of mass $ M $is moving in a circle of fixed radius $R$ in such a way that its centripetal acceleration at time $t$ is given by $n^2 R t^2$ where $ n$ is a constant. The power delivered to the particle by the force acting on it, is:

asked May 22, 2017 by priyanka.c

1 answer

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