Terminal Velocity Lab Report

When needle dropped the needle hit the water and sunk to the bottom of the beaker.

The purpose of this assignment is to work out a parachute design and investigate parachute’s drop time. Parachutes are designed to fall slowly so that the person can land safely to the ground, as shown in figure 1. Parachutes are big, but not heavy and have a larger surface area for air resistance like traps the air from escaping out of it. This is because the air pushes the parachute back up, but the force of gravity pulls the parachute to the earth.

Drag, when air passes around the bob-sled it creates drag. This drag slows the bob-sled down. To minimize the amount of drag the bob-sled undergoes,

It also said that ‘‘if you slowly stretch the rubber band until it can go no further and then hold it for few seconds, the rubber band

The purpose of the lab is to find a projectile’s horizontal velocity and make comparisons of the effects of different inclined planes with the projectile of a ball.

In this lab we tested the effect of the air friction on a free fall object using a stopwatch and photogate. One of the objective of the experiment was to get one of the free falling object acceleration to be close to 9.8 meter/second sq. The reason of that objective was to see if the theory of the acceleration of any object in free fall is downward on earth have the magnitude of about 9.8 meter/second sq. or not. To accomplish this we separated this experiment in two part.

2. Falling Times (in seconds) 3. Object 4. Horizontal Speed 5.

which in fact as the radius was shortened the velocity decreased. In this lab there were several sources

Finally, the frequency and the mass of the spinning object (rubber stopper) are inversely proportional to one another specifically that as the mass increases, the frequency decreases.As the spinning mass’s weight increases, it would take more force to rotate it causing it to slow down. These larger time intervals would drastically decrease the frequency as the growing mass would result in a lower frequency.

When the heavier cylinder is placed into the glass, it displaces more water since it will displace water equal to it's weight. Therefore the level of the water rises and the cylinder floats lower.

Second Law: The acceleration depends on the mass of the rollercoaster and the force of gravity that is pulling the rollercoaster.

A soft-sphere experiences a different force within a moving fluid, such as drag, buoyant weight, inertia to motion changes, and electrical interaction forces with nearby pore walls (Sharma & Yortsos, 1987) (Herzig, Leclerc, & Goff, 1970) (Mcdowell-boyer, Hunt, & Itar, 1986). Therefore, these suspended particles in fluid leads to the formation of larger particle aggregates through the collision and adhesion between them and this phenomenon have been called agglomeration. Besides agglomeration, process splitting of large particle aggregates into small aggregate or single particles and called as fragmentation. Most probably these two phenomena’s of agglomeration and fragmentation took place together in a system (Henry, Minier, Pozorski, & Lefèvre, 2013). The physical mechanism that leads to clogging of channel is extremely complicated and still a lot of study is going on to understand its complexcity. The simplest cause of clogging is either particle is entering a smaller size channel as compare to particle size or there is a gradual increase in particles size, which leads to channel blockage (Goldsztein & Santamarina, 2004). Another possibility is arch formation within a channel. Once the particles are in the arching configuration, forces induced by the shear on the arch can hold the particles in place and

This Study done by McCarthy was to find out the force of an impact on a cat when landing on its feet. The formula that McCarthy used was the force (F) equals the mass (m) multiplied by the change in velocity (∆ v/t) which gives you F = m ∆(v/t ). The cat in the experiment weight about 5.37 kg, which would be used as the mass of the cat. McCarthy used a Vernier Force Plate with a plank of wood on top so they could measure force and tension of the cat landing on it. The cat was held in the same place and was dropped from five different heights, each height was tested three times. McCarthy also tested a 3.32 kg medicine ball to test an inanimate object against the cat (McCarthy

A 3 foot (91cm) diameter ball with axle bearings was made. When towed behind a boat it was found that at speeds

(2) Any lesser height, not less than eight inches, resulting in a drop contact velocity equal to the greatest probable sinking speed likely to occur at ground contact in normal power­off landings.