Holiday Home Work Worksheets - Krishna Public School International - 2016 Page 21
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24100 km per hour up to distances less than 500 metres. If the cheetah spots his
ball is in contact with the wall for 0.04s. What is the acceleration of the ball ?
2
prey at a distance of 100 meters what is the minimum time it will take to get its
12. A train starting from rest move with a uniform acceleration of 0.2m/s
for 5 min
prey ?
calculate the speed acquired and the distance travelled in this time ?
3.
A police jeep is chasing velocity of 45km/h. A theif in another jeep moving
13. A car acquires a velocity of 180 km/h in 20 sec. starting from rest find
with a velocity of 153 km/h. police fires a bullet with muzzle velocity of
(a)
acceleration
180 m/s the velocity it will strike the car of the thief is ?
(b)
average velocity
4.
A car is travelling at 20 m/s along a road. A child runs out into the road 50 m
(c)
the distance travelled in this time
ahead and the car driver steps on the brake pedal. what must the car’s
14. A bullet is moving at a speed of 367 m/s when it embeds into a lump of mois
deceleration be if the car is to stop just before it reaches the child ?
clay. The bullet penetrates for a distance of 0.0621 m. Determine the
5.
On a 120 km long track, a train travels the first 30 km at a speed of 30 km/h.
acceleration of the bullet while moving into the clay. (Assume a uniform
How fast train travel the next 90 km so that average speed would be
acceleration)
60 km/h ?
15. A bike acceleration uniformly from rest to a speed of 7.10 m/s over a distance
6.
An object covers half the distance with the the speed of 20 m/s and other half
of 35.4 m. Determine the acceleration of the bike.
with a speed of 30 m/s. Find average speed ?
Chemistry
7.
150 metres long train crosses a man walking at the speed of 6km/h in the
1.
Learn Ch-1 & Complete exercise Question Answer
opposite direction in 6 seconds. The speed of the train in km/h is how much ?
2.
Write experiment 2 to 6 in lab record.
Biology
8.
The velocity of a car in 10 sec. changes from 10m/s to 50m/s What will be
acceleration ?
1.
Write experiment 7 to 10 in lab record.
9.
A train acquire velocity of 80 km /h in just half an hour after start. Find its
S.ST
acceleration ?
1.
Prepare a file project on “Green Revolution” and its impact on the
10. Car is travelling at 20m/s along a road. A child runs out into the road 50m
environment.
ahead and the car driver steps on the brake pedal. What must the car’s
2.
Locate on India political map (refer geography book pg 19, 49,55)
deceleration be if the car is to stop just before it reaches the child ?
(a)
All Indian states and union territories
11. A ball hits a wall horizonatlly at 6m/s. It rebounds horizontally at 4.4m/s. The
(b)
Indian rivers and mountains
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