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A -- When a body is at rest then the net force acting on that body is zero.
B -- Since, steel has more density than plastic and wood. So, its mass will be greater and hence it will have greater value of inertia, as inertia of a body is measured by the mass of the body. Heavier the body, greater is the force required to change its state and hence, greater is its inertia.
C -- At the highest point the momentum of ball will be zero because gravitational force is attracting it so no force applied to it is remaining at the highest point and as we know ,
momentum=mass multiplied by velocity ,where force enhance the momentum hence when no force is remainig its momentun gets to zero and the ball falls down.
D -- Obviously the bird...because it has very less mass in comparison to car.
E -- Yes action and reaction force are equal and opposite but they act on different bodies and not on the same body.
F -- Initially the cracker was at rest. The initial momentum of the system is zero. When the cracker bursts, it splits into splinters. According to conservation of linear momentum, the final momentum of the system has to be zero. So, the splinters fly in off symmetrically in all direction such that the overall momentum is zero.
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A -- When a body is at rest then the net force acting on that body is zero.
B -- Since, steel has more density than plastic and wood. So, its mass will be greater and hence it will have greater value of inertia, as inertia of a body is measured by the mass of the body. Heavier the body, greater is the force required to change its state and hence, greater is its inertia.
C -- At the highest point the momentum of ball will be zero because gravitational force is attracting it so no force applied to it is remaining at the highest point and as we know ,
momentum=mass multiplied by velocity ,where force enhance the momentum hence when no force is remainig its momentun gets to zero and the ball falls down.
D -- Obviously the bird...because it has very less mass in comparison to car.
E -- Yes action and reaction force are equal and opposite but they act on different bodies and not on the same body.
F -- Initially the cracker was at rest. The initial momentum of the system is zero. When the cracker bursts, it splits into splinters. According to conservation of linear momentum, the final momentum of the system has to be zero. So, the splinters fly in off symmetrically in all direction such that the overall momentum is zero.
Hope it helps..
Mark this answer brainliest if you really find it useful.
Keep learning
Thanks
Anubhav0355:
wait its not complete
ok
done
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