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Manisha .
Subject: Science
, asked on 24/5/18
Formula for displacement
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2
Manisha .
Subject: Science
, asked on 23/5/18
What is velocity ? Write differences betweem speed and velocity. Please don't provide any links.
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3
Manisha .
Subject: Science
, asked on 23/5/18
What is velocity ? Write differences between speed and velocity
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1
Manisha .
Subject: Science
, asked on 23/5/18
What is uniform acceleration
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1
Manisha .
Subject: Science
, asked on 23/5/18
What is magnitude
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2
Rajat Dwivedi
Subject: Science
, asked on 23/5/18
Q28:
28. The velocity of a particle increases from u to v in time t during which it covers a distance s. If the particle has a uniform acceleration, then which one of the following equations does not apply to the motion?
$\left(1\right)2\mathrm{s}=\left(\mathrm{v}+\mathrm{u}\right)\mathrm{t}\phantom{\rule{0ex}{0ex}}\left(2\right)\mathrm{a}=\frac{\mathrm{v}-\mathrm{u}}{\mathrm{t}}\phantom{\rule{0ex}{0ex}}\left(3\right){\mathrm{v}}^{2}={\mathrm{u}}^{2}-\frac{2\mathrm{a}}{\mathrm{s}}\phantom{\rule{0ex}{0ex}}\left(4\right)\mathrm{s}=\left(\mathrm{u}+\frac{1}{2}\mathrm{at}\right)\mathrm{t}\phantom{\rule{0ex}{0ex}}$
Answer
1
Rajat Dwivedi
Subject: Science
, asked on 23/5/18
40 plz
With steps
Answer
1
Rajat Dwivedi
Subject: Science
, asked on 23/5/18
30
Plz with step
Answer
1
Rajat Dwivedi
Subject: Science
, asked on 23/5/18
Explain with steps:-
21. A car increases its speed from 20 km/h to 50 km/h in 10 seconds its acceleration is
$1.0.30m/{s}^{2}2.0.18m/{s}^{2}3.083m/{s}^{2}4.0.50m/{s}^{2}$
Answer
1
Rajat Dwivedi
Subject: Science
, asked on 23/5/18
30 and 35 with steps
Answer
1
Rajat Dwivedi
Subject: Science
, asked on 23/5/18
21 and 28 plz with steps
Answer
1
Ananti
Subject: Science
, asked on 22/5/18
Temperature of a body can be positive, negative or zero. Is it a vector quantity?
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2
Sanyam Jain
Subject: Science
, asked on 22/5/18
Distance ,displacement, speed, velocity and accelaration. Write down daily application based on above terms and explain it in detail.
Answer
1
Krishna Jha
Subject: Science
, asked on 21/5/18
Do question 10.
10.
The below table shows the velocity of the motor bike at various intervals of time. Plot a velocity-time graph.
Calculate:
(a) decceleration between 5s and 7s
(b) acceleration between 7s and 10s
(c) decceleration between 10s and 15s
(d) total distance travelled by the motorbike in 15s.
Answer
1
Rajat Dwivedi
Subject: Science
, asked on 21/5/18
Q12
Q12. A ball strikes the floor vertically downward with a speed 8 m/s and rebounds with the same speed. The magnitude of its change in velocity will be
(1) Zero (2) 5 m/s
(3) 10 m/s (4) 40 m/s
Answer
1
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28. The velocity of a particle increases from u to v in time t during which it covers a distance s. If the particle has a uniform acceleration, then which one of the following equations does not apply to the motion?

$\left(1\right)2\mathrm{s}=\left(\mathrm{v}+\mathrm{u}\right)\mathrm{t}\phantom{\rule{0ex}{0ex}}\left(2\right)\mathrm{a}=\frac{\mathrm{v}-\mathrm{u}}{\mathrm{t}}\phantom{\rule{0ex}{0ex}}\left(3\right){\mathrm{v}}^{2}={\mathrm{u}}^{2}-\frac{2\mathrm{a}}{\mathrm{s}}\phantom{\rule{0ex}{0ex}}\left(4\right)\mathrm{s}=\left(\mathrm{u}+\frac{1}{2}\mathrm{at}\right)\mathrm{t}\phantom{\rule{0ex}{0ex}}$

With steps

Plz with step

21. A car increases its speed from 20 km/h to 50 km/h in 10 seconds its acceleration is

$1.0.30m/{s}^{2}2.0.18m/{s}^{2}3.083m/{s}^{2}4.0.50m/{s}^{2}$

10.The below table shows the velocity of the motor bike at various intervals of time. Plot a velocity-time graph. Calculate:(a) decceleration between 5s and 7s

(b) acceleration between 7s and 10s

(c) decceleration between 10s and 15s

(d) total distance travelled by the motorbike in 15s.

Q12. A ball strikes the floor vertically downward with a speed 8 m/s and rebounds with the same speed. The magnitude of its change in velocity will be

(1) Zero (2) 5 m/s

(3) 10 m/s (4) 40 m/s