Dominique Vickers Quantitative Questions Chapter 4 3. No, gravity is always acting on an object. Also, if the object is moving at a constant velocity then friction would also be acting on it. 5. If only one force acts on an object, then the net force could not be zero, which would cause the object to be have an acceleration and the velocity could not be zero. 6. A) yes, if no forces acted on the ball it would not move B) the pavement because the normal force from the pavement causes an equal force on the ball, which makes it bounce. C) Greater, the ball is moving with more force towards the pavement which would cause the normal force to be higher. 8. The force that is applied to the desk or wall from your foot has an equal force applied to your foot (Newton’s second law) …show more content…
It would collapse because extra weight would push down on the box as you pushed yourself upwards, and the extra force would be too much for the box. 13. The string would break on the bottom because the tension on the bottom exerted from pulling it would be greater than the tension on the top because it does not have enough time to transfer. 16. The acceleration decreases because if the force is viewed like a triangle (with the diagonal string as the hypotenuse) then the horizontal side has a smaller force. This does change the normal force because the rope is pulling upwards. 19. An apple 24. When the rope is pulled the tension increases, which makes the force increase. It is not possible to prevent the bag from sagging because gravity will always pull the bag down. Extra Problems 1. No, a single force would prevent the net force from being zero, which would require the acceleration to exist. With acceleration, the speed would constantly increase. 2. Tension needs to be greater than the weight for acceleration to be in the correct
m= 10km2 x 1000m x 1000m = 107m2 107m2 x 15= 1.5 x 1.8m3 = 1.5 x 1011kg
That is to say, that the rock at the top of the tire may be going twice as fast as car itself. Similarly, at the point of contact of with the road, the velocity of the rock is 0.
We ran into Newtons First Law, which claims that an object resists change in motion, as the marble rolled down the floor it didn’t stop until it was acted against by friction. As we moved on, Newtons Second Law came into play when we were creating our lever as we need a ball that would roll down with enough acceleration that it could knock down the objects. Newton’s second law claims, that F=MA. So, we choose a golf ball since it would have more mass than a rubber ball, but it would have less acceleration when the lever was started. This way, it would knock the upcoming objects. Newtons Third Law claims that every action yields an equal and opposite reaction. This is proven in our Rube Goldberg Machine when the small car was rolling down the tracks as the wheels pushes against the track making the track move backwards. The track provides an equal and opposite direction by pushing the wheels forward.
First law- Objects at rest will stay at rest and objects in motion will stay in motion in a straight line unless acted upon by an unbalanced force.
The ball on the floor acts like a compressed spring. It pushes on the floor with a force proportional to its displacement from its equilibrium shape. The floor pushes back with a force of equal size in the upward direction. This force is greater in size than the weight of the ball. The resultant force is in the upward direction and the ball accelerates upward. When the ball's shape is the shape it has when it is sitting still on the floor, (just slightly squashed), there is no resultant force. When the ball's shape relaxes further, the resultant force is acting downwards. But it already has velocity in the upward direction, so the ball keeps on going upward until its speed has reached zero.
According to Newton's second law, the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object; or
1) an object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force
Here mass, acceleration, momentum, and force are the quantities that are defined externally i.e. they are the externally defined quantities. It is also equally true that Newton’s laws of motion do not suffice to characterize the motion of deformable and rigid bodies. After the generalization of the laws of motion propounded by Newton in 1950 by Leonhard Euler, the laws were equally accepted for rigid bodies, and this was later called as Euler's laws of motion. This theory was later applied in the deformable bodies, and the laws were equally true in that condition, as well. Even though this law is outmoded by laws of relativity, this law is equally applicable in the situation where the speed of objects are less than the speed with which light travels.
Question 2 Paragraph: Newton’s laws of motion affects the efficiency of a rollercoaster by revealing how to design that ride. The first law, an object in motion will stay in motion until another force is acted upon it, let’s the designers know that the roller coaster will not start with a specific amount of force. Some rollercoasters use engines, steep downhills, etc. The second law, that states that the net force of an object is equal to the product of its acceleration and mass, helps roller coaster designers know how to calculate the net force of the coaster. The third law, which states that every action has it’s own opposite reaction, explains why if the tires of the roller coaster pushes against the track while the track pushes back on the tires pushes the roller coaster to keep going.
in real life there is not frictionless surface or even space for that matter. However if we imagine for the moment
Sure, objects simply tied to the ground can work, but if these objects were to fall, then the fall would have to be pre-rendered, or sequenced. A simple change in the height from which an object falls, and this wouldn't look realistic. The object would look as if fell too quickly, or the environment would be limited to set height increases.
In this second lab, we had to stack blocks and pull them across a flat surface at a steady rate. I started with one block and went up to four blocks. With one block, the force required was one Newton. With four blocks, the force required was 2.5 Newton’s. When the mass was increased, the force had also increased. For every block that was added, the force went up ...
Newton’s third law is “When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body. His third law says that all force between to two objects exist in equal magnitude and opposite direction. The action and the reaction, it does not matter which one it is we can not have either of them without the other. For example if you are walking across the floor there is a force between the floor and you and you and the floor. Its the same when you dive off a diving board, you push down on the springboard. The board springs back and forces you into the air. The formula is F1=-F2. The forces are equal in magnitude and opposite in
Newton’s theory consisted of the three laws of motion. The first one, every body continues in its state of rest, or of uniform motion, unless it’s compelled to change that state by forces impressed upon it. The second law states that the change of motion is proportional to the motive force impressed, and is ma...
1) The net external force on the propeller of a 3.7 kg model airplane is 6.8 N forward.What is the acceleration of the airplane?