Physics (For 1st SEC.) Mr. Sabry Badr
Quiz
•
Physical Ed
•
9th Grade
•
Hard
sabry badr
Used 1+ times
FREE Resource
9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the tangential velocity of a body that undergoes a uniform circular motion is doubled and the radius of the circular path is increase four times, the centripetal acceleration ............
gets halved
gets quadrupled
gets doubled
remains unchanged
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A man of mass 70 kg rides a bicycle on a curved road of radius 20 m with a speed of 2 m/s. If the centripetal force that acts on both the man and the bicycle is 20 N, so the mass of the bicycle is ....... kg
20
25
30
100
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Two balls have the same mass, so if the distance between their centers is 4 m and the attraction force between them is 11.8 x 10-9 N, the mass of each ball equals........ kg (Take: G=6.67x 10-11 N.m2/kg2)
43.4
50
53.2
56
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the distance between the centers of two bodies decrease to half, the mutual attraction force between them will be .........
doubled
halved
quartered
quadrupled
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
If the acceleration due to gravity on the surface of the Earth = 9.8 m/s2 and on Mars = 3.7 m/s2, so the ratio between the gravitational constant on Earth and that on Mars = ...............
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
An object weighs 200 N on the Earth's surface, so the weight of this object on a planet having a mass that is 2 times as that of Earth and having a diameter that is 4 times as that of the Earth equals....... N
25
50
100
1600
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A body of mass 4 kg moves in a circle of circumference 20 π m with a constant speed of 20 m/s, so the centripetal force that acts on the body is .......... N
100
160
1000
1600
8.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A plant has a mass = 3.4 x 1020 Kg and radius 5900 Km, So the intensity of the gravitational field at point lies at a distance of 2600 Km from it = ........................ m/s2
4.5 x 10- 4
3.13 x 10- 4
8 x 104
2.5 x 104
9.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A body weight 60 N at the Earth’s surface, So its weight at height from the Earth’s surface that equal the quarter of the Earth’s diameter = ................. N
26.6
40.2
120
1.2
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