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Gen. Science |
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| 1)The universal law of gravitation was propounded by - | |||
| Kepler | Galileo | ||
| Newton | Copernicus | ||
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| 2)The gravitational force with which the sun attracts the earth | |||
| is less than the force with which the earth attracts the sun. | is same as the force with which the earth attracts the sun. | ||
| is more than the force with which the earth attracts the sun. | is constant throughout the year. | ||
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| 3)If the distance between the earth and the sun were twice what it is now, the gravitational force exerted on the earth by the sun would be | |||
| twice as large as now | four times as large as it is now | ||
| half of what it is now | one-fourth of what it is now | ||
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| 4)The weight of a body is | |||
| the same everywhere on the surface of the earth. | maximum at the pole. | ||
| maximum at the equator. | more on the hills than in the plains. | ||
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| 5)Let WP and WE be the weights of a body at the pole and at the equator respectively. If the earth were not rotating then | |||
| WP would be more | WP would remain unchanged | ||
| WE would remain unchanged | WE would be less | ||
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| 6)A person weighs more in a lift, which is | |||
| moving up with constant velocity | moving down with constant velocity | ||
| accelerating upward | accelerating downward | ||
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| 7)A body is taken from the earth to the moon | |||
| its mass will be different but weight will remain the same | its mass will remain the same but weight will be different | ||
| both mass and weight will be different | its mass and weight will be different | ||
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| 8)One finds it more difficult to walk on ice than on a concrete road because | |||
| the friction between the ice and the feet is less than that between the concrete and feet | ice is soft and spongy where as concrete is hard | ||
| there is more friction on the ice than on concrete | none of these | ||
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| 9)It is easier to roll a barrel than to pull it because | |||
| the full weight of the barrel comes into play when it is pulled | the surface area of the barrel in contact with the road is more in case of pulling | ||
| rolling friction is much less than sliding friction | None of these | ||
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| 10)When velocity is doubled | |||
| acceleration is doubled | momentum is doubled | ||
| kinetic energy is doubled | potential energy is doubled | ||
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| 11)The work done in holding a weight of 20kg at a height of 1m above the ground is | |||
| 200J | 20J | ||
| Zero | None of these | ||
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| 12)When the speed of a body is doubled, its kinetic energy becomes | |||
| quadruple | double | ||
| half | None of these | ||
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