Question

de oroh me question number followed by the answer. Do not write the que
malopram ocean otsest (3 marks)
7. Answer the following questions in 10–20 words:
a) Define friction.
thuolace
b) Rahul pulls a block by a force of 10 units whereas Kishan pulls a block by a force of 6
anto the opposite side. What is the net force acting on the block? Lines in
Choose the correct option:
a) Which of the following is a contact force?
(1) Electrostatic force
(iii) Gravitational force
hy
(2 marks)
(ii) Frictional force
(iv) Magnetic force
A simple pendulum makes 50 oscillations in 10 seconds. Its time period (T) and
frequency (F) are:
(i) T = 10 seconds and F = 50 Hz
(ii) T = 5 second and F = 0.2 Hz
(iii) T = 0.2 seconds and F = 5 Hz
(iv) T = 5 seconds and F = 50 Hz
(8 mark
swer the following questions in 30-40 words:
Distinguish between sliding friction and rolling friction.
ow frequency sound is faint while high frequency sound is loud. Do you support
atement? Why or why not?
What is the audible frequency range for the human ear?
State two ways to minimise noise pollution.
radio Wr​

Answer 1

Answer:

de oroh me question number followed by the answer. Do not write the que

malopram ocean otsest (3 marks)

7. Answer the following questions in 10–20 words:

a) Define friction.

thuolace

b) Rahul pulls a block by a force of 10 units whereas Kishan pulls a block by a force of 6

anto the opposite side. What is the net force acting on the block? Lines in

Choose the correct option:

a) Which of the following is a contact force?

(1) Electrostatic force

(iii) Gravitational force

hy

(2 marks)

(ii) Frictional force

(iv) Magnetic force

A simple pendulum makes 50 oscillations in 10 seconds. Its time period (T) and

frequency (F) are:

(i) T = 10 seconds and F = 50 Hz

(ii) T = 5 second and F = 0.2 Hz

(iii) T = 0.2 seconds and F = 5 Hz

(iv) T = 5 seconds and F = 50 Hz

(8 mark

swer the following questions in 30-40 words:

Distinguish between sliding friction and rolling friction.

ow frequency sound is faint while high frequency sound is loud. Do you support

atement? Why or why not?

What is the audible frequency range for the human ear?

State two ways to minimise noise pollution.

radio Wr is your answer