Second Law of Motion
Trending Questions
A rope which can withstand a maximum tension of 400 N is hanging from a tree. If a monkey of mass 30 kg climbs up the rope, in which of the following cases will the rope break? Take g=10ms−2 and neglect the mass of the rope.
The monkey climbs up with a uniform speed of 5 ms−1.
The monkey climbs up with a uniform acceleration of 2 ms−2.
The monkey climbs up with a uniform acceleration of 5 ms−2.
The monkey climbs down with a uniform acceleration of 5 ms−2.
(Take g=10 m/s2)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/845371/original_05.png)
- 20:3
- 5:1
- 3:1
- 5:2
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1679007/original_3.png)
- √5Sv2ρ
- √2Sv2ρ
- √7Sv2ρ
- √3Sv2ρ
- 10, 10
- 15, 5
- 35, −15
- 25, −5
- 140 N
- 100 N
- 60 N
- 30 N
- tan−152
- tan−114
- tan−112
- tan−132
Force exerted on wall is
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1034185/original_2.png)
- 2 aV2dcosθ
- 2 aV2dsinθ
- 2 aVdcosθ
- aVd cosθ
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/911780/original_1.png)
- m2Fm1+m2
- m1Fm1+m2
- m1F
- m2F
- √2pk
- 2√pk
- 2√2pk
- 2√kp
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/767975/original_06._question.png)
Two masses m and 2m are joined to each other by means of a frictionless pulley as shown below. When the mass 2m is released, the mass m will ascend with an acceleration of
g3
g2
g
2g
A force F is applied horizontally to a block A of mass m1 which is in contact with a block B of mass m2, as shown in the figure. If the surfaces are frictionless, the force exerted by A on B is equal to
m1Fm2
m2Fm1
m1Fm1+m2
m2Fm1+m2
Column-IColumn-II(a) 1 kg block(p) will remain stationary(b) 2 kg block(q) will move down(c) 3 kg block(r) will move up(a) 4 kg block(s) 5 m/s2(t) 10 m/s2
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/926181/original_17.png)
- a−t, b−p, c−s, d−q
- a−p, b−t, c−s, d−q
- a−r, t, b−p, c−q, d−q, s
- a−r, b−p, c−q, d−p
- Possible value of x is only x=2 m
- Possible value of x is not only x=2 m, but there exists some other value of x also
- Time taken is 2 s
- All of the above
A mass m is suspended from a rigid support P by means of a massless string as shown in the figure. A horizontal force F is applied at point O of the rope. The system is in equilibrium when the string makes an angle θ with the vertical. Then the relation between tension T, force F and angle θ is
F=T sin θ
F=T cos θ
F=Tsinθ
F=Tcosθ
On forgetting his 25th anniversary, Vijay as a present from his wife, receives a shoe of 0.5 kg thrown at him with 10 m/s velocity. Find the momentum of assault.
10 Kg m/s
5 N
0.5 N
5 kg m/s
- 5 m/s2
- 10 m/s2
- 25 m/s2
- 2.5 m/s2
- 300 N
- 30 N
- 150 N
- 3 N
नीचे दिए गए प्रश्न के लिए अनुच्छेद
A disc (M, R) rolling without slippage on a rough horizontal surface with coefficient of friction μ collides with smooth wall elastically.
किसी खुरदरे क्षैतिज पृष्ठ जिसका घर्षण गुणांक μ है, पर बिना फिसले लुढ़क रही एक डिस्क (M, R) चिकनी दीवार से प्रत्यास्थ रूप से टकराती है।
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1451628/original_ANTHE2021SOE11SSJ11122021Himage005.jpg)
Q. Velocity of top-most point of disc just after collision, is
प्रश्न - टक्कर के ठीक बाद डिस्क के शीर्षतम बिन्दु का वेग है
- Zero
शून्य - 2v0
- v02
- v0
Two blocks of mass 2 kg and 4 kg are kept in contact with each other on a smooth horizontal surface. A horizontal force of 12 N is applied on the first block due to which they move with certain constant acceleration. Calculate the force between the blocks.
2 N
4 N
8 N
16 N
If the force on a rocket moving with a velocity of 300 m/s is 210 N, then the rate of combustion of the fuel is
0.7 kg/s
1.4 kg/s
0.07 kg/s
10.7 kg/s
A man of mass M is standing on a plank kept in a box. The plank and box as a whole has mass m. A light string passing over a fixed smooth pulley connects the man and box. If the box remains stationary, find the tension in the string and the force exerted by the man on the plank.
(m+M)g2, (M−m)g2
(m+M)g, (M−m)g2
(m+M)g2, (M−m)g
(m+M)g, (M−m)g
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/739591/original_output-onlinepngtools_%283%29.png)
- 8.50 N s, 9.25 ms−1
- 4.25 N s, 9.25 ms−1
- 4.25 N s, 4.25 ms−1
- 8.50 N s, 4.25 ms−1
A block of mass M is pulled along a horizontal frictionless suface by a rope of mass m. If a force F is applied at the free end of the rope, the net force exerted on the block will be
FM(M+m)
Fm(M+m)
FM(M−m)
F
नीचे दिए गए प्रश्न के लिए अनुच्छेद
A disc (M, R) rolling without slippage on a rough horizontal surface with coefficient of friction μ collides with smooth wall elastically.
किसी खुरदरे क्षैतिज पृष्ठ जिसका घर्षण गुणांक μ है, पर बिना फिसले लुढ़क रही एक डिस्क (M, R) चिकनी दीवार से प्रत्यास्थ रूप से टकराती है।
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1451628/original_ANTHE2021SOE11SSJ11122021Himage005.jpg)
Q. Just after the collision, velocity of point of disc in contact with floor, is
प्रश्न - टक्कर के ठीक बाद, डिस्क के उस बिन्दु, जो फर्श के साथ सम्पर्क में है, का वेग है
- v02
- 3v02
- 2v0
- 5v02