Home › JEE Advanced › Mechanics › A force is classified as a contact force when it
A force is classified as a contact force when it
Aacts only on charged bodies
Brequires direct contact between two bodies
Calways acts downward
Dacts only over very large distances
Answer & Solution
Correct answer: B. requires direct contact between two bodies
A contact force arises due to direct contact between bodies. Normal force, friction, and a hand push are standard examples. It is not defined by direction or by whether the bodies are charged.
Related questions
A stone is whirled on a string. The inward force keeping it on its circle is the centripetA ring or sphere rolling without slipping touches the ground at just one point at a time. Experiments show that the coefficient for a sliding object compares with the one for a staThe constant of proportionality linking maximum static friction to the normal force is theThe friction acting before an object begins to slide is distinguished from the friction acA crate is pushed but does not budge. The surface force that cancels the push is called:A book lies still on a table. Balancing its weight is an upward push from the table calledTwo railway wagons collide and couple together. The standard application of conservation o