A projectile is fired vertically with an initial velocity of 560 feet per second. The distance s in feet above the ground after t seconds is given by the equation s=−16t^2+560t. For what range...

A projectile is fired vertically with an initial velocity of 560 feet per second. The distance s in feet above the ground after t seconds is given by the equation s=−16t^2+560t. For what range...

Anissa rides her snowboard down a hill sloped at 25 degrees. The coefficient of kinetic friction between her snowboard and the snow is 0.15. If Anissa's mass is 55 kg, how fast is she going 7 seconds...

Solving for velocity.

Two balls start at the same instant and move slowly along the same straight line. The first and second balls have a displacement of B1 and B2 metres resp. What time will they...

a train is starting from rest moving with uniform velocity 3ms-1 after the max. velocity with retardation of 2ms-1 it came to rest time of journey 1m. find total distance travel by train ?

Question: A landscape architect is planning an artificial waterfall in a city park. Water flowing at 1.75 m/s will leave the end of a horizontal channel at the top of a vertical wall h = 3.35...

A train starting from rest from a platform passes a pole the front part of the train crosses the pole with a velocity u and the real part of the train cross the pole with a velocity v. What is the...

At the bottom of the loop of your roller coaster, the velocity is 30 m/s and the radius of the loop is 50 m. Is the amount of acceleration riders will experience in this loop considered safe? Why...

Joe and his dog Freddie are in a park with Joe standing 60 feet due south of Freddie. Freddie starts to run due east and without stopping or changing direction, catches a ball thrown to him by Joe...

Lincoln goes bungee jumping. He has a mass of 102 kg. a. After his jump, Lincoln hangs from the cord motionless, with the cord stretched by 15 m. What is the spring constant of the bungee...

Blake stands in a canoe in the middle of a lake. The canoe is stationary. Blake holds an anchor with mass 15 kg, then throws it west with a speed of 8 m/s. Blake has a mass of 115 kg and the canoe...

What is the minimum velocity required of a roller coaster at the top of a vertical loop with a radius of 7 m? SHOW ALL WORK PLEASE. May use if needed: Fc = Fn +...

A coaster has a mass of 800 kg and a radius of 5m. What is the minimum speed required at the top of the track to ensure that the coaster does not leave the track? May use: Fc = Fn...

A gun is fired straight up. Assuming that the air drag on the bullets varies quadratically with speed, (1) show that the speed varies with height according to the equations: v2...

For an object whose velocity in ft/sec is given by v(t) = sin(t), what is its distance, in feet, travelled on the interval t = 1 to t = 5? 0.45 0.26 2.82 0...

A 70 kg student is riding a roller coaster and is at the top of the vertical loop. The loop has a radius of 16 m, and the car's velocity at the top is 12 m/s. What is the student's apparent weight...

A roller coaster car of mass of 300 kg is going through a loop at a velocity of 15 m/s. If the loop has a radius of 12 m, what centripetal force is the roller coaster experiencing? SHOW...

The range of a projectile fired at an angle theta with the horizontal and with an initial velocity of v0 feet per second is r = 1/32v0^2 sin 2theta, where r is measured in feet. Determine the expression...

The County Fair Swing carries the mass of riders and chairs in a circular path in a horizontal plane while suspended by cables or chains. Let's assume that: Each chair with riders is supported...

Physics and kinematics and rest I'll explain

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