Physics It is easier to roll a barrel full of coal tar than to pull it because the rolling friction is much less than the sliding friction coal tar is a liquid and it flows in the barrel when it is rolled the full weight of the barrel comes into play when it is pulled more surface area of the barrel is in contact with the road when it is pulled the rolling friction is much less than the sliding friction coal tar is a liquid and it flows in the barrel when it is rolled the full weight of the barrel comes into play when it is pulled more surface area of the barrel is in contact with the road when it is pulled ANSWER DOWNLOAD EXAMIANS APP
Physics Which of these is true of all simple machines? Work input > work output None of these These make work easier Both A & B Work input > work output None of these These make work easier Both A & B ANSWER DOWNLOAD EXAMIANS APP
Physics Identify the vector quantity from the following Heat Work Time Angular momentum Heat Work Time Angular momentum ANSWER DOWNLOAD EXAMIANS APP
Physics The height of a geo-stationary satellite from the Earth's surface is approximately : 36,000 km 30,000 km None of these 42,000 km 36,000 km 30,000 km None of these 42,000 km ANSWER DOWNLOAD EXAMIANS APP
Physics What principle/law explains the working of the hydraulic brakes in automobiles ? Posieulle's principle Bernoulli's law Pascal's law Archimedes' principle Posieulle's principle Bernoulli's law Pascal's law Archimedes' principle ANSWER DOWNLOAD EXAMIANS APP
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