25.When a force of constant magnitude and a fixed direction acts on a moving object, then its path is 1) Circular 2) Parabolic 3) Straight line 4) Either (2) or (3)

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Q. When a force of constant magnitude and a fixed direction acts on a moving object.then its path is ?

Q. (1) : If a body moving in a circular path has a constant speed, then there is no force acting on it.
(2) : The direction of the velocity vector of a body moving in a circular path is changing.

Q. An object of mass

10 k g

moves at a constant speed of

10 m s^{- 1}

. A constant force that acts for

4 s

on the object gives it a speed of

2 m s^{- 1}

in the opposite direction. The magnitude of force acting on the object is (Take the direction of initial velocity as positive)

Q. An object of mass

10 k g

moves at a constant speed of

10 m s^{- 1}

. A constant force that acts for

4 s

on the object gives it a speed of

2 m s^{- 1}

in the opposite direction. The magnitude of force acting on the object is (Take the direction of initial velocity as positive)

Which of the following statements is/are true?

1. Forces in the same direction add up.

2. Two forces in opposite directions resulting in net force, equal to their difference, in the direction of the larger force.

3. Change in either direction or magnitude of a force changes its effect.

4. When more than one force is acting on an object, the effect on the object is due to the net force acting on it.

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