Laws of Motion | Science
I. Choose the correct answer
1) Inertia of a body depends on
2) Impulse is equals to
3) Newton’s III law is applicable
4) Plotting a graph for momentum on the X-axis and time on Y-axis. slope of momentum-time graph gives
5) In which of the following sport the turning of effect of force used
6) The unit of ‘g’ is m s-2. It can be also expressed as
7) One kilogram force equals to
8) The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be____kg
9) If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will
10) To project the rockets which of the following principle(s) is /(are) required?
II. Fill in the blanks
1. To produce a displacement force is required.
2. Passengers lean forward when sudden brake is applied in a moving vehicle. This can be explained by inertia of motion.
3. By convention, the clockwise moments are taken as negative and the anticlockwise moments are taken as positive.
4. Gear is used to change the speed of car.
5. A man of mass 100 kg has a weight of 980 N at the surface of the Earth.