Force and Laws of Motion Important Questions Using second law of motion, derive the relation between force & acceleration. A bullet of 10 g strikes a sand-bag at a speed of 1000 m/s & gets embedded after travelling 5 cm. Calculate : the resistive force exerted by the sand on the bullet the time taken […]
Force and Laws of Motion Notes Force:- A push or pull on an object is called force. A force can change- the state of motion of an object i.e, motion to rest or, rest to motion. the speed of the object the direction of motion the shape of the object Contact Force:- The force exerted […]
Matter In Our Surroundings Important Questions Why do we see water droplets collected on the outer surface of a container containing ice cold water? Explain why temperature remains constant during interconversion of states of matter? Why do people sprinkle water on the roof after a hot sunny day? Why is ice at 273 K more […]
Matter In Our Surroundings Notes Physical Nature of Matter:- Matter is made up of particles. Particles of matter are very small that we can’t see by our naked eyes. Characteristics of Particles of Matter:- Particles of matter have space between them. Particles of matter are continuously moving. Particles of matter attract each other. We can […]
Motion Important Questions Define uniform circular motion and give example of it. Why is it called accelerated motion? A car moves with a speed of 30 km/h for half an hour, 25 km/h for one hour and 40 km/h for two hours. Calculate the average speed of the car. Derive the equation for position – […]
Motion Notes Motion:- When a body changes its position with respect to time then the body is said to be in motion. Rest:- A body is said to be in rest if it does not change its position with respect to time. Rectilinear Motion:- Motion in a straight line is called rectilinear motion. Scalar Quantity:- […]