James is lying on his body board out in the surf. 12 waves pass him every minute. These waves are about 14m apart from one crest to the next and they rise 2 meters above the normal water level. a)...

James is lying on his body board out in the surf. 12 waves pass him every minute. These waves are about 14m apart from one crest to the next and they rise 2 meters above the normal water level. a)...

On a very wet and slippery rugby field a 120 kg halfback tackles a 90 kg second rower. Prior to the collision the halfback is slipping with a velocity of 5.6m/s south and the second rower is sliding...

A car of 1 tonne travels at a speed of 100km/h collides with a 3 tonne van travelling 20km/h in the same direction. After the collision the car rebounds at 20km/h. Calculate the impulse on the van...

A small car of mass 500kg is travelling at 120km/h when it hits stationary truck (of 1.5 tonne mass) head on. The small car rebounds and travels in the opposite direction at 40km/h. The collision...

A car (m=900kg) travelling at 70km/h hits a pedestrian (m=60kg) who is travelling at 1m/s in the same direction. After the collision the car has a velocity of 30km/h in the same direction it was originally...

The total mechanical energy of an object with mass mm at height hh in a closed system can be written as ME = 12mv2 + mghME = 12mv^2 + mgh. Solve for v, the velocity of the object, in terms...

A sail boat is traveling north at 10 km/h, relative to the water. The water is flowing north at 5 km/h. What is the velocity of the boat to the ground? What is the equation needed???

This is a science/math problem. I'm pretty sure I have to convert the minutes to hours, but I don't know what to do with the kilometers then. I need clarification and steps to show me what I need...

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...

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...

Solving for velocity.

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...

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...

If the current carried by a conductor is doubled what happens to a)the charge carrier density b)the current density c)the electron drift velocity d)the average...

A baseball player hits a foul ball straight up in the air from a height of four feet off the ground. The initial velocity as the ball comes off the bat is 130 feet per second. The motion of ball can...

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...

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...

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