In which of the following examples can you sense motion?
A. The flight of a bird
B. A stationary train
C. Leaves flying through air
D. A stone lying on a hill

How will you explain presence and absence of motion? Leaves flying through air

Which of the following is not an example of free fall? A.Moon revolving around the Earth B. Earth revolving around the Sun C. Parachute jumping D. Artificial statellites revolving around the Earth

Choose the correct alternative and write it along with its allotted alphabet: What can you say about the planes in which the incident and reflected sound waves lie? A. Planes perpendicular to each other B. The same plane C. Planes parallel to each other D. Two different planes

Which of following statements are correct ? ltbgt (a) Centre of mass of a body always coincides with the centre of gravity of the body (b) Central of mass of a body is the point at which the total gravitational torque on the body is zero (c ) Couple on a body produces both translational and rotation motion in a body (d) Mechanical advantage greater than one means that small efforts can be used to lift a large load

Choose the correct option? A sound carried by air from a sitar to a listener is a wave of following type. A. Longitudinal stationary B. Transverse progressive C. Transverse stationary D. Longitudinal progressive

Observe the given figure and answer the following questions. a. What does the given figure indicate ? b. Name any fuel produced by this method. c. Identify 'X' in the given figure. d. Give any two examples of plants used for production of fuel by this method. e. Name the process by which glucose is converted into liquid fuel in this method.