MEDIUM
8th ICSE
IMPORTANT
Earn 100

Describe the function of a simple mercury barometer. State its disadvantages.

Important Questions on Force and Pressure

MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 3 - Force and Pressure>Check your progress>Q A
It is easier to open a door by applying the force at its handle than at the hinged end. Why?
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 3 - Force and Pressure>Check your progress>Q A
Write any two applications of moment of force.
MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 3 - Force and Pressure>Check your progress>Q B
A nut is opened by a spanner of length 30 cm. If the applied force is 20 N, find the moment of force needed to loosen the nut.
MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 3 - Force and Pressure>Check your progress>Q B
A force of 250 N produces a moment of force of 500 N m. Calculate the moment arm.
MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 3 - Force and Pressure>Check your progress>Q B
Calculate the force which will produce a moment of 60 N m when the perpendicular distance between the point of application of force and the fixed point is 60 cm.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 3 - Force and Pressure>Check your progress>Q A
The SI unit of pressure is _____.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 3 - Force and Pressure>Think and answer>Q 2
Explain why the wall of a dam is made thicker at the bottom.
MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 3 - Force and Pressure>Exercises>Q F
A motorcycle weighs 1200 N. If the pressure exerted by one of its tyre is 120 Pa, then find the area of the tyre in contact with the road.