Advertisements
Advertisements
प्रश्न
Which of the following is not the force at a distance?
पर्याय
Electrostatic force
Gravitational force
Frictional force
Magnetic force
Advertisements
उत्तर
Fractional force
Explanation:
Frictional force is a contact force because it acts only when two surfaces are in contact. Electrostatic, gravitational, and magnetic forces can act without physical contact, so they are forces at a distance.
APPEARS IN
संबंधित प्रश्न
Give one example in the case where the force is of contact.
How can you feel a force of 1 N?
A body of mass 1 kg is thrown vertically up with an initial speed of 5 m s-1. What is the magnitude and direction of force due to gravity acting on the body when it is at its highest point? Take G = 9.8 n kg-1
How much acceleration will be produced in a body of mass 10 kg acted upon by a force of 2 kgf?(g = 9.8 ms-2)
A cricket ball of mass 100 g strikes the hand of a player with a velocity of 20 ms-1 and is brought to rest in 0.01 s calculate
1) the force applied by the hand of the player.
2) the acceleration of the ball
A lead bullet of mass 20g, travelling with a velocity of 350 ms-1, comes to rest after penetrating 40 cm in a still target. Find:
1) the resistive force offered by the target and
2) the retardation caused by it
Define 1 Dyne.
If we apply force against the direction of motion of the body, then the body will
Two identical bullets are fired one by a light rifle and another by a heavy rifle with the same force. Which rifle will hurt the shoulder more and why?
Does the palm apply any force on the ball, when we place our palm in front of a moving ball?
