A tuning fork of an unknown frequency produces the second resonance position above a 49.2 cm long closed pipe. If the speed of sound is 336 m/s, what is the frequency of the tuning fork?
Posted 3 years ago by Xoxo_780 in Physics 20 | 0 answers
#waves #interference #air columns
A car accelerates from rest to a velocity of 3.0 m/s in a time, t. If the car were to accelerate from rest at the same rate for a time of 4t then it's velocity would be __________________m/s. Answer to two significant digits.
Posted 3 years ago by BoBa in Physics 20 | 1 answers
#physics #acceleration
A marble is released from rest at the top of an incline and accelerates down the incline at 1.7m/s2. After it has moved throught a distance if 5.5 m it is moving at _____m/s.
Posted 3 years ago by B0BA in Physics 20 | 1 answers
#acceleration
While riding at a constant speed,
Posted 3 years ago by trey16 in Physics 20 | 1 answers
#newtons 1st law
A box of cereal is pushed with an applied force of 2.4 N [W] across a table. If the cereal box has a mass of 2.5 kg and the box accelerates at 0.41 m/s2 [W], the coefficient of friction for the table top is _____. (Give your answer with correct number of significant digits)
Posted 2 years ago by Oxygen in Physics 20 | 0 answers
#physics
Calculate the displacement change (magnitude and direction) of the ball when it is moved from the initial to the final position given as follows.
Initial position: (xi, yi) = (-10.0 m, 10.0 m);
Final position: (xf, yf ) = (15.0 m, -20.0 m).
Posted 2 years ago by hahaha123 in Physics 20 | 0 answers
#physics
During
Posted 2 years ago by Happy in Physics 20 | 0 answers
#acceleration
You have an apple that you would like to weigh, but you don't have a scale. You do have a slinky and a quick internet search tells you that it has a spring constant of 10.0 N/m. You hang the apple from the wonky and measure that the slinky stretches 9.92 cm. What is the mass of the apple?
Posted 2 years ago by Milabila246 in Physics 20 | 1 answers
#elastic potential
two ropes are attached to a heavy box to pull it along the floor. One rope applies a force of 475 N due west, the other applies a force of 315 N due south. What is the net force exerted on the box
Posted 2 years ago by manny0333 in Physics 20 | 1 answers
#vectors
You are asked to design a rollercoaster. It will have ten attached cars, each of which will have a mass of 500 kg and carry six people with average mass of 70.0 kg. You want to design a vertical circular loop with a radius of 55.0 m. The centre of the circle would have a height of 71.0 m above the ground. Assume the track is frictionless.
Calculate the minimum speed the rollercoaster cars would have to have at the top of the circle in order to continue around the circle and not fall off the track.
Calculate the mechanical energy of the cars at the top of the circle, with respect to the ground.
Calculate the speed of the cars when they are 40? below the horizontal
Calculate the amount of tension on the track when the cars are 40? below the horizontal.
Calculate the maximum amount of tension that the rollercoaster track would have to withstand within the loop. Include a free body diagram of the cars and specify the location in the circle.
Posted 1 year ago by ajn212121 in Physics 20 | 0 answers
#velocity #physics #work and energy #tension #free body diagrams