Question

CH-O8 Motion . Class 9

Answer in one word

.1. Deceleration of a body is eepressed in

.2.body goes from P to Q with a velocity of 20 ms and
comes back from Q to p with a velocity of 30 m/s. Then
The average velocity during the whole journey is

.3. A body covers Half of its journey with a speed of 60 ms
and the other half with a speed of 40 m/s. Then the
average speed during the whole journey is

.4. In the equation : S=ut + 1/2 at² ? S stands for distanace
covered in

.5. In the equation of motion
y =at + bt² the units of a
a and b are respectively

.6.A wooden slab starting from rest , slides down a 10m long inclined planes with an acceleration of 5 m/s. What
would be its speed at the bottom of the inclined plane

.7. A 50 m long train passes over a 250 m long bridge at a
velocity of 30 km/h. How long will it take to pass completely over the bridge.​

Answer 1

Answer:

sorry

but I really don't know this one

Explanation:

its not in my course ....so sorry