or the following 5 questions wright whether or not it is true-or-false. 1. According to Kepler's third law, the orbital period of a planet is inversely proportional to its average distance from the Sun. True or False 2. A force must act on a car in order for it to go around a curve at a constant speed. True or False 3. A 1 hp motor does more work in one hour than a 1 kW motor. True or False 4. When a rocket is fired, the magnitude of the rocket's momentum is equal to the magnitude of the momenta of its ejected exhaust gases. True or False 5. Both energy and momentum are scalar quantities. True or False For the next following 5 questions fill in the blank. 6. Linear momentum is conserved if and only if the ____ ____ ____ is zero. 7. When a net force acts for some time on an object, the object's linear momentum must change; this change is known as _____. 8. According to the work-energy theorem, the net work done on an object is equal to its change in

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.