Question
Describe the two experiments related to static friction with diagram.
✓
Answer
►
►It was observed that if two glass rods rubbed with wool or silk cloth are brought close to each other, they will repel. [Fig. (a)].
►The two strands of wool or two pieces of silk cloth, with which the rods were rubbed, also repel each other.
►The glass rod and wool are attracted to each other.
►Similarly, two plastic rods rubbed with cat's fur will repell each other [Fig. (b)] but attract the fur.
►On the other hand, the plastic rod attracts the glass rod [Fig. (c)] and repels the silk or wool with which the glass rod is rubbed. The glass rod repels the fur.
►It was observed that if two glass rods rubbed with wool or silk cloth are brought close to each other, they will repel. [Fig. (a)].
►The two strands of wool or two pieces of silk cloth, with which the rods were rubbed, also repel each other.
►The glass rod and wool are attracted to each other.
►Similarly, two plastic rods rubbed with cat's fur will repell each other [Fig. (b)] but attract the fur.
►On the other hand, the plastic rod attracts the glass rod [Fig. (c)] and repels the silk or wool with which the glass rod is rubbed. The glass rod repels the fur.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Define the term ‘Half-life’ of a radioactive substance. Two different radioactive substances have half-lives T1 and T2 and number of undecayed atoms at an instant N1 and N2, respectively. Find the ratio of their activities at that instant.
A rigid wire consists of a semi-circular portion of radius R and two straight sections The wire is partially immersed in a perpendicular magnetic field B, as shown in the figure. Find the magnetic force on the wire if it carries a current i.
When a capacitor is joined with a series LR circuit in series, then current flowing through the circuit increases. Explain, why?
Find the value of X in the given figure.
Draw a diagram to show the standing pressure wave and standing displacement wave for the 3rd overtone mode of vibration of an open organ pipe.
Rain is falling vertically. A man running on the road keeps his umbrella tilted but a man standing on the street keeps his umbrella vertical to protect himself from the rain. But both of them keep their umbrella vertical to avoid the vertical sun-rays. Explain.
An aeroplane travels over a rectangular field 100m × 50m, parallel to its length. What should be the speed of the plane so that the field becomes square in the plane frame?
The radius of a spherical conductor shell is $R$ and the charge on it is $Q$. Compare the potential at a distance 2 R from the centre of the sphere with the potential at a distance $R / 2$.
→A bullet going with speed 350m/s enters a concrete wall and penetrates a distance of 5.0cm before coming to rest. Find the deceleration.
In a given figure, a rectangular object is shown. Its length is I, breadth is 0.5 I and thickness 0.25 I . To measure its resistance, potential difference $V$ is applied in two ways [figure (a) and (b)]. In which arrangement, the resistance of the substance will be more?
→