مراجعة عامة | Physics Model (1)
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سؤال 1 of 20
1. سؤال
An object initially moves with a constant velocity of 15 m/s to the west. While moving with this velocity, the object starts to uniformly accelerate to the east at 5 m/s2.Determine the displacement of the object 10 s after it starts to accelerate.
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سؤال 2 of 20
2. سؤال
Two vectors make an angle 𝜃such that the scalar product of these two vectors is half the magnitude of their vector product. Calculate angle 𝜃.
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سؤال 3 of 20
3. سؤال
A bullet was shot into a cube of rubber and penetrated it a distance of 5.21 cm before stopping. The bullet was moving with a velocity of 150 m/s before entering the rubber. Calculate the average acceleration of the bullet inside the rubber.
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سؤال 4 of 20
4. سؤال
The following is the velocity–time graph of a bike which starts its motion from rest on a straight road. Calculate the displacement of the bike from the starting point.
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سؤال 5 of 20
5. سؤال
A boat, initially at rest, starts to move in a straight path with uniform acceleration. The average velocity of the boat during 15 s is 3 m/s. Calculate its instantaneous velocity 20 s after it starts moving.
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سؤال 6 of 20
6. سؤال
The mass of a box A is found to be (2.25±0.06) kg and the mass of a box B is found to be (1.59±0.02) kg. How much more mass does box A have than box B?
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سؤال 7 of 20
7. سؤال
Which of the following graphs represents the change in velocity with time of a freely falling object? Neglect air resistance.
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سؤال 8 of 20
8. سؤال
Imagine a book rests on a table. If the force due to Earth on the book is the action force, then the reaction force acts on the…………by………. .
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سؤال 9 of 20
9. سؤال
The following figure shows four vectors, , , , and . Which of the following is correct?
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سؤال 10 of 20
10. سؤال
During a race, a car starts its motion from rest and moves with constant acceleration until it reaches a velocity 𝑣 at 𝑡=𝑡1 . Then, it continues with this velocity for a period of time. Finally, at 𝑡=𝑡2, its velocity starts decreasing uniformly until it stops. Which of the following graphs represents the motion of the car?
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سؤال 11 of 20
11. سؤال
When taking any measurement, why is it recommended to take the measurement several times and then calculate the average of the readings?
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سؤال 12 of 20
12. سؤال
Two identical objects are thrown from the top of a tall building at the same time with two different horizontal velocities. If object A is thrown with a velocity 𝑣 and object B is thrown with a velocity 2𝑣, which object will hit the ground first?
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سؤال 13 of 20
13. سؤال
A building has evenly spaced floors. If ball A is dropped from the first floor and ball B is dropped from the fourth floor, calculate the ratio between the time taken by ball B to hit the ground and the time taken by ball A to hit the ground.
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سؤال 14 of 20
14. سؤال
Two boats, boat A and boat B, sail in the sea, as shown in figure 1. After 7 s,the two boats become adjacent at the next buoy, as shown in figure 2. Calculate the average velocity of boat A given that the distance between two successive buoys is 100 m.
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سؤال 15 of 20
15. سؤال
A ball was thrown from the ground at an angle 𝜃 with a velocity 𝑣. The ball reached a maximum height of 8 m and a maximum range of 15 m. Calculate the value of 𝜃.Let 𝑔=10m/s2.
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سؤال 16 of 20
16. سؤال
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سؤال 17 of 20
17. سؤال
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سؤال 18 of 20
18. سؤال
Which of the following graphs describes an object moving with acceleration?
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سؤال 19 of 20
19. سؤال
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سؤال 20 of 20
20. سؤال
If a free-falling body has a velocity 𝑣 after covering a distance of 1 m from the start of the fall, what is its velocity 1 s after the start of the fall?
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