CBSE Class 11-science - Common Forces in Mechanics Videos

• A block of mass m is placed on a wedge as shown. Find difference between maximum and minimum (a(max) – a(min) ) horizontal rightward acceleration of wedge for which block remains at rest with respect to wedge. (A) 10g/9 (B) g/9 (C) g (D) None of these
  
• find the velocity in rms
• Assertion :pseudo force in an imaginary force which is recognized only by a non inertial observer to explain the physical situation according to Newton's laws Reason:pseudo force has no physical origin of the the basic interaction in nature, it doesn't exist as on action reaction .
• What are contact forces? Give some examples of contact and non contact forces.
• What is Normal Reaction? Explain with diagram.
• Give the formula of Spring Force and state the significance of the negative sign.
• A gardener is mowing a lawn by pushing and pulling the machine. In which condition is the normal force highest?
• Consider a book lying on a table. Which forces are acting on the book?
• What do you mean by equilibrium under concurrent forces?
• Two forces of 5 kg and 12 kg are connected at the two end of the light inextensible string that passes over a frictionless pulley. Find the acceleration of the masses and the tension in the string, when the masses are released.

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