) A block and tackle system has 3 pulleys in the upper fixed block and two in the lower moveable block, if the an effort of 200N and the efficiency of the system is 60% Calculate i) The velocity...

) A block and tackle system has 3 pulleys in the upper fixed block and two in the lower moveable block, if the an effort of 200N and the efficiency of the system is 60% Calculate i) The velocity...

A rock is thrown upward with a velocity of 18 meters per second from the top of a 37 meter high cliff, and it misses the cliff on the way back down. When will the rock be 3 meters from the water,...

What formulas to I use to work this out. Thanks for your help. A person is riding a bike with a tail wind of 12 m/s. The velocity of the cyclist is 55km/h. What is the velocity...

Any help would be most grateful. An Olympic rower in training. They row from one side of river to the other 98m. Start and finish are perpendicular relative to flow of water current...

Use the position function s(t)= -16t2 + 98 to find the velocity in feet/seconds at time t= 1 second. The velocity at t=c seconds is given by lim t>c , s(c)-s(t)/c-t please...

Hi I have been given the position vector of a particle, and have then differentiated this to get the velocity vector for the patricle. I have now been asked to find the speed, but am...

The earth turns every 24 hours. The radius is 6.38 x 10^6m if it came to a screeching halt, what would the velocity of the people who live at the equator? b) what direction would they travel...

If a bowling ball is dropped out of an airplane, what will it's speed (velocity) be after 3.4 seconds, assuming no air resistance? (Hint: Use the equation v = 32t

I'm not sure how to approach this problem and I'd really appreciate any help! If a ball is thrown directly upward with a velocity of 36 ft/s, its height (in feet) after t seconds is given...

An airplane is flying at 200 m/s at an angle of 30o north of east. How fast is the plane flying North? An airplane is flying at 200 m/s at an angle of 30o north of east. How fast is the plane flying...

Raoul accelerates up the hill. After moving 10 meters, the engine expires. Raoul coasts up the hill, comes to a stop, and then begins to roll back down the hill. Joe calculates that Raoul’s distance...

Joe decides to construct a new toy. He takes a solid fuel rocket engine from his model rocket kit and a flat bed rail car from his train set . He straps the engine to the back of the rail car. He...

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 236 miles and a perigee of 220 miles...

At what velocity must a basketball player leave the ground to rise 1.25m above the floor in an attempt to get the ball. Show all the steps taken to get to the answer.

The one-way course was 5.00 miles long. Acceleration rates are often described by the time it takes to reach 60.0mi/h from rest. If this time was 4.00s, and Burt accelerated at this rate until he...

It is a velocity question

What is the momentum of a system of two particles with these respective masses and velocities: 3.75 kg moving north at 5.6m/s and 4.2 kg moving northwest at 2.3m/s?

A 42 kg child slides from the top of a 3 m high playground slide. With what speed will the child reach the bottom of the slide assuming: (a)There is no friction? (b) 23 J of energy is dissipated due...

Options are i) v=0 ii) v=2u iii) v=0.5u iv) v=u

A ball is thrown upward with an initial velocity of 42 meters per second from a cliff that is 10 meters high. The height of the ball is given by the quadratic equation h=-4.9t^2+ 42t+70 where...

Rebecca D.

Experienced, credentialed math tutor (Stanford/M.I.T. grad)

Palo Alto, CA

5.0
(753 ratings)

Austen C.

Experienced Physics and Math Tutor (High School & College)

Islip, NY

4.5
(2 ratings)

Paul J.

Choose Me As Your Tutor, and I Will Devote Myself To Your Success!

Vero Beach, FL

5.0
(666 ratings)