CBSE Class 9 c9potentialconservation — practice questions
12 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 9 c9potentialconservation in the app →Per NCERT Class 9 Science, POTENTIAL ENERGY is which type of energy?Per NCERT, what is the formula for the GRAVITATIONAL POTENTIAL ENERGY of an object of mass m raised to height Per NCERT, in the formula U = mgh, what is the VALUE of g (acceleration due to gravity) on Earth — typically uPer NCERT Example 7.7, what is the PE of a 200 g cricket ball at a height of 10 m (taking g = 10 m/s²)?Per NCERT Activity 7.1 (heavy ball dropped onto sand from different heights), how does the depression in sand Per NCERT, MECHANICAL ENERGY is defined as which combination?Per NCERT, the CONSERVATION OF MECHANICAL ENERGY principle states which fact?Per NCERT, an object falling FREELY from height h (released from rest) — what is the velocity v at the bottom Per NCERT Example 7.8, what is the velocity of a child at the BOTTOM of a frictionless slide of height h — assPer NCERT Activity 7.2 (the simple pendulum), why does the pendulum bob REACH ALMOST THE SAME HEIGHT on the opPer NCERT, why does a REAL pendulum eventually slow down and stop — even though conservation of mechanical enePer NCERT, when a ball is in FREE FALL from height h, at what point during the fall is its mechanical energy m