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تمارين اونلاين Physics | April Revision P2
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سؤال 1 of 20
1. سؤال
the weight of a body at north pole to its weight at the equator ……..one
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سؤال 2 of 20
2. سؤال
opposite graph represents the relation between the weight and the mass of a group of bodies when they are placed on two planets P and Q. If a body that weighs 650 N on planet P is translated to planet Q, then ……..
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سؤال 3 of 20
3. سؤال
Evaluate the acceleration by which two loads fall freely
the mass of the first load = 5 kg and the other = 7 kg, neglecting
the air resistance. ……………….m/s2
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سؤال 4 of 20
4. سؤال
If the orbital velocity is doubled and the radius of the circular path is also doubled, then the centripetal acceleration ……………….
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سؤال 5 of 20
5. سؤال
The ratio between the central gravitational force of two bodies have the same mass, the first body moves with velocity 5 m/s. in a circle of diameter 4m and the second body moves with velocity 10 m/s. in a circle of diameter 8 m. is ………….
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سؤال 6 of 20
6. سؤال
The velocity of the body moves in a circular orbit is determined from the relation ………..
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سؤال 7 of 20
7. سؤال
The centripetal force on a car moving in a curve is resulted due to:
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سؤال 8 of 20
8. سؤال
If the radius of a circular orbit is increased to four times its original value, the centripetal force required to make the speed of the body constant would be:
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سؤال 9 of 20
9. سؤال
A stone of mass 4 kg is tied in string its length 10 m revolve in horizontal plane, the tension force of string is 160 N, so the speed is:
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سؤال 10 of 20
10. سؤال
A person whirls a stone attached to the end of a string in a horizontal circle as shown in figure. If he lets the string free suddenly at the position (x); in which direction does the stone move after being free ( the effect of gravity should be neglected ):
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سؤال 11 of 20
11. سؤال
A racing car of mass 905 kg moves in a circular path of perimeter 3.25 km. the tangential velocity of the car if the force required to keep the circular motion of the car = 2140 N ………………….m/s.
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سؤال 12 of 20
12. سؤال
Two bodies of masses m1 and m2 in space and the distance between them is (r). When the mass m1 is doubled and the distance between them is doubled the gravitational force between them:
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سؤال 13 of 20
13. سؤال
If the distance between the centers of two identical balls is 1 m and the force of attraction between them is 1 N, the mass of each one of them equals:
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سؤال 14 of 20
14. سؤال
If the distance between the centers of two bodies is doubled and one of masses is doubled, the attractive force between them would be:
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سؤال 15 of 20
15. سؤال
The acceleration due to Earth’s gravity is:
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سؤال 16 of 20
16. سؤال
Planet its mass three time earth’s mass and its radius three times earth’s radius, the ratio between the gravitational on this planet and earth planet.
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سؤال 17 of 20
17. سؤال
The time taken by the satellite to rotate one complete rotation around the Earth is given by the relation:
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سؤال 18 of 20
18. سؤال
The velocity required by a satellite to rotate around the Earth:
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سؤال 19 of 20
19. سؤال
The velocity of rotation required by the Earth to orbit the Sun depends on:
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سؤال 20 of 20
20. سؤال
An earth satellite revolves in a circular orbit at a height of 300 km above the earth’s surface. Given that the earth’s radius is 6380 km, and its mass is 5.98 1024 kg and G = 6.67 x 10-11m2 / kg2 The speed of the satellite ……m/s
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