Force and Laws of Motion — Science STD 9 — Question

Lysosome arises from:

A freely falling object travels 4.9m in 1st second, 14.7m in 2nd second, 24.5m in 3rd second, and so on. This data shows that the motion of a freely falling object is a case of:

1. Uniform motion.
2. Uniform acceleration.
3. No acceleration.
4. Uniform velocity.

Which of the following contribute to green house effect?

1. Methane (CH₄).
2. Carbon dioxide (CO₂).
3. Chlorofluorocarbons (CFCs).
4. All of these.

Solid-gas colloid is:

A force is a result of:

When a horse pulls the tonga, the tonga moves forward due to:

Archimedes' principle states that the buoyant force applied to an object 

Unicellular organisms take in oxygen and pass out carbon dioxide through:

1. Diffusion.
2. Exosmosis.
3. Endosmosis.
4. Active transport.

Which of the following can produce longitudinal waves as well as transverse waves under different conditions?

1. Water.
2. TV transmitter.
3. Slinky.
4. Tuning fork.

A boy is pushing hard on a wall. Is he doing work?