Physics
Fill in the blanks.
(a) …………… is a push or pull acting on a body that changes the motion of an object.
(b) Force applied does not change the …………… of an object.
(c) …………… and …………… are the two types of unbalanced forces.
(d) Sliding friction is …………… than rolling friction.
(e) Friction is caused due to …………… on the surface of objects.
Answer
(a) Force is a push or pull acting on a body that changes the motion of an object.
(b) Force applied does not change the mass of an object.
(c) Frictional force and gravitational force are the two types of unbalanced forces.
(d) Sliding friction is greater than rolling friction.
(e) Friction is caused due to irregularities on the surface of objects.
Related Questions
When the body has …………… shape, the friction is minimum.
Observe the given image and answer the following questions.
(a) Is this a method of increasing or decreasing friction?
(b) What are the disadvantages of friction?
State whether the following statements are true or false. Correct the false statements.
(a) Force can change the shape and size of an object.
(b) Collision force is a non-contact force.
(c) Friction does not depend on weight of a body.
(d) Lubricating is a method used to increase friction.
(e) Presence of grooves in soles makes it easier to walk.
Match the columns.
Column A Column B 1. Force (a) Polishing 2. Contact force (b) Electrostatic force 3. Non-contact force (c) Push or pull 4. Static friction (d) Normal force 5. Reduction of friction (e) Body at rest