Question

1 What are the differences between amphibians and reptiles. (any 3)
Q19. i) What does the odometer of an automobile measure?
DI) A bus decreases its speed from 80 km/hr to 60 km/hr in 5s. Find the acceleration of
the bus?
Q20. A car accelerates uniformly from 18 km/hr to 36km/hr in 5s. Calculate (i) the
acceleration and (ii) the distance covered by car in that time.
Q21. i) State the universal law of gravitation Give its mathematical expression.
ii) What is the SI unit of universal constant of gravitation 'G'?
ii) An object weights 15 N on earth. Calculate its weight on moon
Q22. A ball is thrown vertically upwards with the velocity of 49 m/s. Calculate
i) The maximum height to which it rises.
The total time it takes to return to the surface of the earth.
iii) The position of the object after 4 seconds!
OR
A stone is allowed to fall from the top of a tower 100m high and at the same time another
stone is projected vertically upwards from the ground with the velocity of 25m/s. Calculate
when and where the two stones will meet. (take g=10m/s)​

Answer 1

Answer:

Q19.i--Odometer is an instrument used for measuring distance travelled by a vehicles

Answer 2

I don't know the answer

pls mark as brainliest bro