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Vikash (tutor)
Subject: Physics
, asked on 23/5/18
Pls ans dear m.experts:
Q.10. One litre of water is added to one litre of milk. What will be the density of the mixture? Given 1 litre
=
1000
c
m
3
and density of milk is 1.04 g/
c
m
3
.
[Ans. 1.02 g/
c
m
3
]
Answer
2
Bishakha Bhattacharjee
Subject: Physics
, asked on 22/5/18
Sir/Madam can you please tell me the answer of question no. - 14 , 15
Q14. A space craft flying in a straight course with a velocity of 75 km s
–1
fires its rocket motors for 6.0 s. At the end of this time, its speed is 120 Km s
–1
in the same direction. Find : (i) the space craft's average acceleration while the motors were firing, (ii) the distance travelled by the space craft in the first 10 s after the rocket motors were started, the motors having been in action for only 6.0 s.
Ans. (i) 7.5 Km s
–2
, (ii) 1065 Km
Q15. A train starts from rest and accelerates uniformly at a rate of 2 m s
–2
for 10 s. It then maintains a constant speed for 200 s. The brakes are then applied and the train is uniformly retarded and comes to rest in 50 s. Find : (i) the maximum velocity reached, (ii) the retardation in the last 50 s, (iii) the total distance travelled, and (iv) the average velocity of the train.
Ans. (i) 20 m s
–1
, (ii) 0-4 m s
–2
, (iii) 4600 m, (iv) 17.69 m s
–1
Answer
1
Harsh Vardhan Arora
Subject: Physics
, asked on 21/2/20
A car starting from rest acquires a velocity of 54 km/h in 20s. Calculate the acceleration of the car in S.I. unit.
Answer
1
Yashika Gupta
Subject: Physics
, asked on 27/8/18
a body travelling due north at 2 metre per second is uniformly accelerated towards south at 4 m per second for 5 seconds calculate the displacement of the body
Answer
3
Afreen .....
Subject: Physics
, asked on 29/8/20
please jaldi answere karo guys
Answer
21
Kripa Nayak
Subject: Physics
, asked on 1/2/20
Difference between :
a.Spring Equinox and Autumn Equinox
b.Perihelion and Aphelion
Answer
1
Afreen .....
Subject: Physics
, asked on 21/8/20
Kartic kha hoo yaar
Answer
17
Krishna Kumar Manchala
Subject: Physics
, asked on 16/5/18
Solve this:
Q). A system consists of mass 5 gm, 10 gm and 15 gm located at and (1, 5, - 3), (2, 5, 7) and (3, 3, - 1) respectively. Then position of centre of mass of the system is
1) x-cordinate of the centre of mass is 7 / 3.
2) y-cordinate of the centre of mass is 4.
3) z-cordinate of the centre of mass is 4 / 3.
4) x-cordinate of the centre of mass is 3 / 7.
Answer
1
Savikaran
Subject: Physics
, asked on 17/2/20
Plz solve velocity time graph questions
Answer
2
Sarvanshu Mishra
Subject: Physics
, asked on 31/12/17
A car ismoving on a circular path does its velocity will change or there is an acceleration.
Answer
4
Afreen .....
Subject: Physics
, asked on 24/8/20
Kartic r u here ...!!!!
Answer
10
Muskan
Subject: Physics
, asked on 9/5/19
A car travels first 30 km with a uniform speed of 60 km h-1 and then next 30 km with a uniform speed of 40 km h-1. Calculate : (I) the total time of journey, (ii) the average speed of the car
Answer
3
Misty Singh
Subject: Physics
, asked on 5/7/18
solve ques 15 and 16
Answer
1
Bishakha Bhattacharjee
Subject: Physics
, asked on 22/5/18
Sir/madam please tell me the answer of question no. - 3
3. A body is moving in a straight line and its displacement at various instants of time is given in the following table
Time (s)
0
1
2
3
4
5
6
7
Displacement (m)
2
6
12
12
12
18
22
24
Plot displacement - time graph and calculate
(i) total distance travelled in 1 s 5 s.
(ii) average velocity in time interval 1 s to 5 s.
Answer
2
Pinky Shrivas
Subject: Physics
, asked on 29/7/18
Please answer this question
Answer
2
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What are you looking for?
Q.10. One litre of water is added to one litre of milk. What will be the density of the mixture? Given 1 litre 1000 and density of milk is 1.04 g/.
[Ans. 1.02 g/]
Q14. A space craft flying in a straight course with a velocity of 75 km s–1 fires its rocket motors for 6.0 s. At the end of this time, its speed is 120 Km s–1 in the same direction. Find : (i) the space craft's average acceleration while the motors were firing, (ii) the distance travelled by the space craft in the first 10 s after the rocket motors were started, the motors having been in action for only 6.0 s.
Ans. (i) 7.5 Km s–2, (ii) 1065 Km
Q15. A train starts from rest and accelerates uniformly at a rate of 2 m s–2 for 10 s. It then maintains a constant speed for 200 s. The brakes are then applied and the train is uniformly retarded and comes to rest in 50 s. Find : (i) the maximum velocity reached, (ii) the retardation in the last 50 s, (iii) the total distance travelled, and (iv) the average velocity of the train.
Ans. (i) 20 m s–1, (ii) 0-4 m s–2, (iii) 4600 m, (iv) 17.69 m s–1
a.Spring Equinox and Autumn Equinox
b.Perihelion and Aphelion
Q). A system consists of mass 5 gm, 10 gm and 15 gm located at and (1, 5, - 3), (2, 5, 7) and (3, 3, - 1) respectively. Then position of centre of mass of the system is
1) x-cordinate of the centre of mass is 7 / 3.
2) y-cordinate of the centre of mass is 4.
3) z-cordinate of the centre of mass is 4 / 3.
4) x-cordinate of the centre of mass is 3 / 7.
3. A body is moving in a straight line and its displacement at various instants of time is given in the following table
Plot displacement - time graph and calculate
(i) total distance travelled in 1 s 5 s.
(ii) average velocity in time interval 1 s to 5 s.