Quiz
physics103
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Perguntas do quiz (19)
1Consider the vector A= 3 i+2 j and vector B =- i+4 j find the 2A-B ?
- A7i
- B7i+8 j
- C5i+ 8j
- D-7i
2The vector C in the diagram is equal to :
- AC=B-A
- BC= A-B
- CC=A+B
- DC=-B-A
3Vector M= 3 points in the positive x-axis and vector N = 4 points in the negative y direction the angle of the resultant vector M+N with respect to the positive x-axis ?
- A307
- B53
- C323
- D37
4The two vectros A and B are in the xy plane find A×B
- A10k
- B-10k
- C8.3
- D10i+10j
5Two vectors A=4i+4j and B=-6i+7j .If C is a vector such that A+2B-C=0 .Calculate the angle that vector C makes with the positive x-axis ?
- A122
- B114
- C66
- D138
6A boy walks along x-axis from x1=10 m to x2 =30 m to x3=-20 m His displacement:
- A70
- B-70
- C-30
- D-50
7The position of a particle moving on the x-axis is given by the equation x=5+t^2-t^3 find the instantaneous velocity at t=2s ?
- A-8m/s
- B8m/s
- C-2m/s
- D-1m/s
8An automobile driver puts on the brakes and decelerates from 30 m/s to zero in 10s what is the distance does the car travel ?
- A300
- B150
- C225
- D75
9If the displacement of an object is given in SI unit by x=-3t+4t^2 its velocity and acceleration are respectively ?( at t=2 s)
- Apositive,positive
- Bnegative,positive
- Cpositive,negative
- Dnegative,negative
10A bird accelerating from rest at a constant rate experiences a displacement of 28m in 11s .What is its average velocity ?
- Azero
- B1.7
- C2.5
- D150
11A ball is thrown vertically from with 10m/s from the top of the building of height H .its strikes the ground after 4 s .Find the height of the building ?
- A40m
- B20m
- C60 m
- D120m
12A plane is traveling north at 200 m/s turns and then travel south at 200 m/s ,the change in its velocity is ?
- A380 m/s north
- B400 m/s north
- C380 m/s south
- D400 m/s south
13Starting from rest a 4 kg object reaches a speed of 8 m/s in 2 s what is the net force on the object?
- A4
- B2
- C18
- D16
14An object is thrown vertically upward with initial velocity of 25 m/s the time to reach the maximum height is ?
- A2.5
- B10
- C5
15A 4 kg block slides down a frictionless inclined plane with an acceleration 3 m/s2 , what is the angle of the incline above horizontal ?
- A35.3
- B45.2
- C17.5
- D23.6
16A 60 kg person in an elevator while standing on a scale .The scale reads 400 N what is the acceleration ?
- A3.3 upward
- B6.6 upward
- C3.3 downward
- D6.6 downward
17If M= 2 kg what is the tension in string 1 ?
- A3.5
- B34.6
- C11
- D1.2
18The block shown is pulled across the horizontal surface at constant speed by the force shown if M= 5 kg ,F=14 N and θ=〖53〗^o is the angle of the force F with horizontal, what is the coefficient of kinetic friction between the block and the horizontal surface ?
- A0.33
- B0.21
- C0.44
- D0.38
19In the figure shown ,the surface smooth ,M1=2kg ,M2=3kg ,θ=〖53〗^o. Find the tension in the string ?(M1 the mass on the incline and M2 the other one)
- A40.8
- B19.2
- C4.8
- D21.6
Informações
- Descrição
- م.الاء خضر اكاديميه القصور
- Autor
- Eng Ala'a
- Idioma
- English
- Visualizações
- 89
- Avaliação
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