Q.9 The sum of the squares of two given numbers x and y is 656. Their LCM and HCF are 80 and
A respectively. Find the sum of x/y + y/x.
Ans 1.23/41
2. 20/41
3. 1120
4.41/20
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Answers
Answer:
sorry,I couldn't understood the question
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Step-by-step explanation:
Name ................................................
Batch.................... Roll No. ...............
21- 08- 2020
22A/TP/P Motion in a plane - Home work Batch: LT.2022 (SPECIAL G-I)
JEE MAIN OBJECTIVE EXAM - PHYSICS
1. If the two vectors A 2i 3j 4k and B i 2j nk ˆ ˆ ˆ ˆ ˆ ˆ
are perpendicular, then the value of ‘n’ is
A) 1 B) 2 C) 3 D) 4
2. Given: ^ ^ ^
A 2i j 2 k
and
^ ^ ^
B i j k
. The unit vector of A B
is
A)
^ ^
3i k
10
B)
^
3i
10
C)
^
k
10
D)
^ ^
3i k
10
3. The projection of a vector ^ ^
3i 4 k
on y - axis is
A) 5 B) 4 C) 3 D) zero
4. Two bodies are projected with the same velocity. If one is projected at an angle of 30o
and the other
at an angle of 60o
to the horizontal, the ratio of the maximum heights reached is
A) 3 : 1 B) 1 : 3 C) 1 : 2 D) 2 : 1
5. The minimum number of vectors of unequal magnitude required to produce a zero resultant is :
A) 2 B) 3 C) 4 D) 1
6. A particle has a displacement of 12m towards east, then 5m towards north and then 6m vertically
upwards what is the magnitude of the sum of these displacements ?
A) 10.28m B) 14.32m C) 22.42m D) 30.82m
7. If the sum of two unit vectors is a unit vector, then the magnitude of their difference is:
A) 3 unit B) 3 unit
C) 1/3 unit D) 1/ 3 unit
8.
a b 1
a b
then angle between a
and b
is
A) 0o B) 45o C) 90o D) 60o
9. What is angle between P Q
and P Q
A) 0 B) 2
C) D) 3
2
10. In a projectile motion: the velocity
A) is always perpendicular to the acceleration
B) is never perpendicular to the acceleration
C) is perpendicular to the acceleration for one instant only
D) is perpendicular to the acceleration for two instants
21A/TP/P/[N1]JJ 2 N-CHEMISTRY
11. A body is thrown with a velocity of 9.8 ms–1 making an angle of 30o
with the horizontal. It will hit the
ground after a time
A) 3 s B) 2 s C) 1.5 s D) 1 s
12. A stone is just released from the window of a train moving along a horizontal straight track. The
stone will hit the ground following
A) Straight path B) Circular path C) Parabolic path D) Hyperbolic path
13. When air resistance taken into account while dealing with the motion of the projectile. Of the following
properties of the projectile, the one which shows an increase is:
A) range
B) maximum height
C) speed at which it strikes the ground
D) the angle at which the projectile strikes the ground
14. A body is projected horizontally with speed 20 m/s. What will be its speed nearly after 5 seconds? (g
= 10 ms–B)
A) 54 m/s B) 20 m/s C) 50 m/s D) 70 m/s
15. The minimum number of vectors of unequal magnitude required to produce a zero resultant is :
A) 2 B) 3 C) 4 D) 1
16. A particle has a displacement of 12m towards east, then 5m towards north and then 6m vertically
upwards what is the magnitude of the sum of these displacements ?
A) 10.28m B) 14.32m C) 22.42m D) 30.82m
17. If the sum of two unit vectors is a unit vector, then the magnitude of their difference is:
A) 3 unit B) 3 unit C) 1/3 unit D) 1/ 3 unit
18. Numerical value of A 4i 3j 5k
is
A) 5 2 B) 2 C) 6 3 D) 0
19. A particle is thrown with an initial velocity 2i 3j m / s ˆ ˆ . The horizontal range is: (g = 10 ms–B)
A) 6
m
5
B) 3m C) 5
m
2
D) 3
m
2
20. A body is thrown with a velocity of 9.8 ms–1 making an angle of 30o
with the horizontal. It will hit the
ground after a time
A) 3 s B) 2 s C) 1.5 s D) 1 s
21. A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10 m/s2
, the range of the
missile is:
A) 40 m B) 50 m C) 60 m D) 20 m
22. A particle is fired with velocity u making angle with the horizontal. What is the change in velocity
when it is at the highest point?
A) ucos B) u C) usin D) ucos u
Name ................................................
Batch.................... Roll No. ...............
21- 08- 2020
22A/TP/P Motion in a plane - Home work Batch: LT.2022 (SPECIAL G-I)
JEE MAIN OBJECTIVE EXAM - PHYSICS
1. B
2. A
3. D
4. B
5. B
6. B
7. B
8. C
9. B
10. C
11. D
12. C
13. D
14. A
15. B
16. B
17. B
18. A
19. A
20. A
21. A
22. C