If an object were completely immersed in a liquid denser than it, the resulting buoyant force would exceed the weight of the object. If there was no air resistance, a feather would fall at the same speed as an apple. The force of gravity is F = mg, where m is the mass of the object and g is the acceleration due to gravity.Įquating, we have mg = ma. If we look at Newton's second law, F = ma. If an object is heavier the force of gravity is greater, but since it has greater mass the acceleration is the same, so it moves at the same speed (if we neglect air resistance). See solution Solutions For High School Physics Questions Solution For Problem # 1 Why is it desirable to keep the wheels rolling on the ice without locking up? When a moving car encounters a patch of ice the brakes are applied. What is the velocity of the arrow immediately after release? Why is it possible to drive a nail into a piece of wood with a hammer, but it is not possible to push a nail in by hand?Īn archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m.
The impact force on each car is the same as hitting a solid wall at: What is the difference between energy and power? What is the difference between centripetal acceleration and centrifugal force? How come in free fall you feel weightless even though gravity is pulling down on you? (ignore air resistance when answering this question). From these equations derive the equation for centripetal acceleration. Why do objects float in liquids denser than themselves?Ī particle is moving around in a circle and its position is given in polar coordinates as x = Rcosθ, and y = Rsinθ, where R is the radius of the circle, and θ is in radians.
High School Physics Questions College and University Physics Questions Extra Challenging Physics Questions High School Physics Questions Problem # 1ĭo heavier objects fall more slowly than lighter objects? To see the questions click on the category you are interested in: This page is a good resource for students who want good quality problems to practice with when studying for tests and exams. In addition to being challenging, these questions are fun and interesting. These questions are designed to challenge and inspire you to think about physics at a deeper level. How high will it go before it begins to fall (g = 9.On this page I put together a collection of physics questions to help you understand physics better. Question A ball is thrown up with a speed of 15 m/s. Speed with which ball hits ground is 20 m/sįinding the time it takes to fall through this height (Acceleration is negative because ball is thrown upwards)Ī cricket ball is dropped from a height of 20 meters.Ĭalculate the speed of the ball when it hits the ground.Ĭalculate the time it takes to fall through this height (g = 10 m/s2)įinding speed of the ball when it hits the ground. (Acceleration is positive because stone falls downwards) Height of bridge will be the distance travelled by stone Calculate the height of the bridge from the water level (g = 9.8 m/s2) The stone takes 2 Seconds to touch the water surface in the river. To estimate the height of a bridge over a river, a stone is dropped freely in the river from the bridge. Find(a) the velocity with which it was thrown up,(b) the maximum height it reaches, and(c) its position after 4 s. Calculate when and where the two stones will meet.Ī ball thrown up vertically returns to the thrower after 6 s. What is the net displacement & total distance covered by the stone?Ī stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Taking g = 10 m/s2, find the maximum height reached by the stone. Calculate(i) the maximum height to which it rises,(ii) the total time it takes to return to the surface of the earth.Ī stone is released from the top of a tower of height 19.6 m.ļalculate its final velocity just before touching the ground.Ī stone is thrown vertically upward with an initial velocity of 40 m/s. Calculate (i) the velocity with which the object was thrown upwards & (ii) the time taken by the object to reach the highest pointĪ ball is thrown vertically upwards with a velocity of 49 m/s. Let g = 10 m s–2 (for simplifying the calculations).(i) What is its speed on striking the ground?(ii) What is its average speed during the 0.5 s?(iii) How high is the ledge from the ground?Īn object is thrown vertically upwards and rises to a heightof 10 m. A car falls off a ledge and drops to the ground in 0.5 s.