A book is at rest on a desk. Which statement is true? PHYSICS The normal force and gravity both point downwards. The normal force is the only force acting on the book There is no normal force acting on the book The normal force balances the force of gravity. Question 2 (1 point) What is tension? a pulling force exerted by a string or rope a muching foron sunstad his string arroneQuestion 2 (1 point) What is tension? a pulling force exerted by a string or rope O a pushing force exerted by a string or rope measured using a beam balance a force between two colliding objects such as a hockey puck and stick Question 3 (1 point) Which statement is true about friction? It is a pulling force exerted by a string or rope It acts perpendicular to the two sliding surfaces It is an attractive force exerted by big masses It resists the sliding motion between objects O