Question

ASSIGNMENT-2-FORCE AND LAWS OF MOTION:

Q-1) A large bus and a van, both moving with a velocity of magnitude v, have a

head on collision and both the vehicles stop after the collision, if the time of

Collision is 1 second then.

a.) Which vehicle experiences smaller force of impact?

b.) Which vehicle experiences the smaller momentum change?

c.) Which vehicle experiences the greater acceleration?

d.) Why is that truck suffers less damage the car?

Q-2) Define inertia

Q-3) what force is needed to produce on acceleration of 2m/s in a body of

mass 3 kg?

Q-4) What is meant by balanced forces?

Q-5) What is force?

Q-6) A person is prone to more serious injuries when falling from a certain

height on a hard-concrete floor than on a sandy surface, explain why.

Q-7) Give a simple experiment to illustrate the inertia of rest.

Class-9th
Subject-Science
plzz ans me fast.......​

Answer 1

Explanation:

Q--2.....Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.

Q--3.... The SI unit of force is Newton or N. So, the force needed to produce an acceleration of 2 m/s in a body of mass 3 kg is 6 N.

Q---4.....Balanced forces: Balanced forces are those that are opposite in direction and equal in size. Balanced forces are considered to be in a state of equilibrium.

Q--5.....force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity.

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