Friction Test -...

A box of mass M is lying on the flat bed of a pickup truck as shown. The truck is moving with a uniform velocity of 15 m/s. What is the value of force of friction between the mass and the bed of the truck?

A porter pushes a box lying on a platform towards the East. In which direction does the force of friction act on the box?

A flat bed truck is accelerating eastwards with an acceleration of 5 m/s². There is a box of mass M sitting loose on the bed of the pickup truck without slipping. What is the value of force of friction on the mass M?

Which of the following statements is true?

A body of mass M just begins to move under the continuous application of a force F on a horizontal surface. If the force is continuously being applied, then what can you say about the speed with which the body is moving?

There are 4 cubes A, B, C and D of identical materials. Their masses are m, 2 m, 4 m and 8 m, respectively. Which of the four is easiest to push on a surface?

Which of the following statements is true?

The force required to overcome friction at the instant an object starts moving from rest is a measure of _______ and the force required to keep the object moving with the same speed is a measure of ________.

Which of the following statements is false?

Which of the following is not an advantage of friction?

Which of the following statements is/are incorrect?

Which of the following statements is true?

Sliding in most machines is replaced by rolling by the use of

The technical name for the friction force exerted by fluids on objects in motion through them is called

On which of the following factors does the drag experienced by a body moving through air depends?

(a) Mass of the body
(b) Shape of the body
(c) Speed of the body