D,E are points on sides AB,AC of triangle ABC such that DE is parallel to BC . If angle a is 40 degrees, b is 30 degrees
Find x,y and z
Answers
Step-by-step explanation:
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Answer:
MOTION:-2
Total points
9/10
Std: IXth
Name of the student: *
Rudra prasad pattnaik
Class/ sec : *
IXA
IXB
IXC
IXD
IXE
IXF
Other:
Roll No: *
28
Date: *
8.9.20
1. A driver decrease it's speed of a car from 25 m/ s to 10 m/ s in 5 seconds. The acceleration of the car is
1/1
a) 33 m/ sec.sq.
b) -3 m/ sec. sq
c) 6 m// sec.sq.
d) 9 m/ sec. sq..
2. A motorbike drives from A to B with a uniform speed of 30 kmph and returns from B to A with a uniform speed of 20 kmph . The average speed is
0/1
a) 42 kmph
b) 44 kmph
c) 24 kmph
d) 14 kmph
Correct answer
c) 24 kmph
3. A moving train is brought to rest with in 20 seconds by applying brakes. If the retardation due brakes is 2 m/ sec.sq. , it's initial velocity is
1/1
a) 04 m/ s
b) 0.4 m/ s
c) 40 m/ s
d) 4.0 m/ s
4. A racing car has a uniform acceleration of 4m/ s. What distance will it cover in 10 seconds after the start?
1/1
a) 2000 m
b) 200 m
c) 20 m
d) 400 m
5. A car of mass 1000 kg is moving with a velocity of 10 m/ s. If the velocity- time graph for this car is a horizontal line parallel to time axis, then the velocity of car at the end of 25 seconds will be
1/1
a) 25 m/ s
b) 10 m/ s
c) 40 m/ s
d) 250 m/ s
6. A train traveling at 20 m/ s accelerates at 0.5 m/ sec. sq. for 30 seconds. How far will it travel in this time?
1/1
a) 825 m
b) 852 m
c) 528 m
d) 285 m
7. A scooter acquires a velocity of 36 kmph in 10 seconds just after the start. The acceleration of the scooter is
1/1
a) 5m/ sec.sq.
b/ 1 m/ sec. sq.
c) 11 m/ sec. sq
d) 4 m/ sec. sq.
8. Find the initial velocity of a car which stopped in 10 seconds by applying brakes. The retardation due to brakes is
1/1
a) 25 m/ s
b) 52 m/ s
c) 40 m/ s
d) 55 m/ s
9. A car travels 30 km at a uniform speed of 40 kmph and next 30 km at a uniform speed of 20 kmph . it's average speed is
1/1
a) 266 m/ s
b) 26.6 m/ s
c) 62.6 m/ s
d) 662 m/ s
10. A scooter ist covers a distance of 3 km in 5 minutes. It's speed in cm/ second is
1/1
a) 100
b) 1000
c) 500
d) 50
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