Select Board & Class

Login
V. Twinkle asked a question
Subject: Science, asked on on 22/4/12
Rajdeep Dey & 1 other asked a question
Subject: Science, asked on on 6/6/14
Vinoth.k & 2 others asked a question
Subject: Science, asked on on 17/4/15
Ayushi As & 1 other asked a question
Subject: Science, asked on on 12/6/15
Arbaz & 2 others asked a question
Subject: Science, asked on on 31/7/15
Rajshree Trivedi & 2 others asked a question
Subject: Science, asked on on 21/9/13
Shivani asked a question
Subject: Science, asked on on 7/6/12
Anoushka Swain & 2 others asked a question
Subject: Science, asked on on 1/5/15
Anjali Solunke asked a question
Subject: Science, asked on on 13/8/12
A.k.singhbuxar Ruchi asked a question
Subject: Science, asked on on 23/7/12
Darshil Modi asked a question
Subject: Science, asked on on 7/6/12
Sehaj Kaur asked a question
Subject: Science, asked on on 13/7/12
Ishant Kaushik asked a question
Subject: Science, asked on on 30/5/12
Ankita Pal & 1 other asked a question
Subject: Science, asked on on 20/7/15
Shubhi asked a question
Subject: Science, asked on on 27/9/12
Gurpreet Kour & 2 others asked a question
Subject: Science, asked on on 3/7/13
Rita asked a question
Subject: Science, asked on on 20/4/12
Thahira & 2 others asked a question
Subject: Science, asked on on 18/6/13

1. An object is moving up an inclined plan. Its velocity changes from 15m/s to 10m/s in two seconds. What is its acceleration? (ans. -2.5m/s2)
2. A body covered a distance of x metre along a semicircular path. Calculate the magnitude of displacement of the body, and the ratio of distance to displacement?
3. A particle moving with an initial velocity of 5m/s is subjected to a uniform acceleration of -2.5m/s2. Find the displacement in the next 4 sec. (ans. 0)
4. Acar covers30km at a uniform speed of 30km/hr. what should be its speed for the next 90km if the average speed for the entire journey is 60km/h? (ans. 90km/hr)
5. A person goes to market, makes purchases and comes back at a constant slower speed. Draw displacement -time and velocity time graphs of the person?
6. A boy runs for 10 min. at a uniform speed of 9km/h. At what speed should he run for the next 20 min. so that the average speed comes 12km/hr? (ans.13.5km/h)
7. A particle was at rest from 9 a.m. It moved at a uniform speed 10km/hr from 9.30 a.m. to10 a.m. Find the average speed between (a) 9.00 a.m. and 10.00 a.m., (b) 9.15 a.m. and 10.00 a.m. (ans. 5km/h, 6.67km/h)
8. An insect moves along a circular path of radius 10 cm with constant speed. If it takes 1 min. to move from a point on the path to the diametrically opposite point, find (a) the distance covered, (b) The speed, (c) the displacement, (d) average velocity.
9. A particle with a velocity of 2m/s at t=0 moves along a straight line with a constant acceleration of 0.2m/s2. Find the displacement of the particle in 10s?
10. A particle is pushed along a horizontal surface in such a way that it starts with a velocity of 12m/s. Its velocity decreases at a uniform rate of 0.5m/s2. (a) Find the time it will take to come to rest. (b) Find the distance covered by it before coming to rest?
11. Atrainaccelerated from 20km/hr to 80km/hr in 4 minutes. How much distance does it cover in this period? Assume that the tracks are straight?
12. A cyclist moving on a circular track of radius 50m completes one revolution in 4 minutes. What is his (a) average speed (b) average velocity in one full revolution?
13. Define Scalar quantities and Vector quantities?
14. Define the term “uniform acceleration”. Give one example of a uniformly accelerated motion.
15. Define the term acceleration . Is it a vector quantity or a scalar quantity?
Neathi Raja asked a question
Subject: Science, asked on on 20/4/16
What are you looking for?

Syllabus