Question

CHOOSE THE CORRECT ANSWER:

1) A force of 20N is acting on an object of mass 10 kg. The
acceleration produced is
(a) 1 ms-2
(b) 2 ms 2
(c) 20 ms (d) 10 ms

2) The physical quantity which is equal to rate of change of
momentum is
(a) displacement (b) acceleration (c) force (d) impulse

3) Impulse is equal to
(a) ma
(b) Ft
(c) mv (d)"

4) Rocket works principle of conservation of
(a) mass (b) energy
momentum d) velocity

5) According to the Newton's III law of motion, action & reaction
(a) always (b) have same to always act (d) act on either
act on the magnitude & in opposite body at normal to
same body direction directions each other

6) A body of mass 1kg is attracted by the earth with a force which
is equal to
(a) 9.8 N (b) 6.67 x 1011
(d) 9.8 ms

7) Velocity and wavelength of light are related by a relation

8) We can see objects because of
(a) reflection (b) refraction (c) transmission (d) diffraction

9) Rainbow formation is due to water droplets

10) The distance below the lens and focus is called
(a) pole (b) radius of curvature (c) focal length (d) principal axis

please answer correctly then only I will Mark ur answer brainliest..​

Answer 1

Answer:

1) (b) 2 ms 2

2) (b) acceleration

3) (b) Ft

4) same body direction directions each other

5) d) velocity

6) (c) transmission

7) Wavelength is the measure of the length of a complete wave cycle. The velocity of a wave is the distance traveled by a point on the wave. In general, for any wave the relation between Velocity and Wavelength is proportionate.

8) (c) transmission

9) A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.

10) (b) radius of curvature

Hope it helps u !!