(7 pts) Part b of Question 17

A = 250 m wide river flows with a uniform speed of = 4.0 m/s toward the east. I take off from the south bank in a boat that moves at = 6.0 m/s with respect to the water to arrive at point on the north bank directly north of my launch. What heading did my boat have to make the journey?

A ball is dropped from a height on a frictionless loop-de-loop of radius = m. What must be the speed of the ball at the bottom of the loop so that it makes it around without losing contact with the track? Please give your answer in units of m/s.

In this system, the rope and pulley have negligible mass and the pulley is frictionless. The blocks have masses = kg and = kg and the coefficient of kinetic friction between and the surface is

Estimate the area of an NCAA college football field. (This is American football, not what Americans call soccer). Go Owls!

An Atwood machine consists of two masses, connected by a string, hanging over a massless, frictionless pulley as shown. There are no additional forces. What is the maximum acceleration that can be seen in this system?

The three blocks shown are released from rest and are observed to move with accelerations that have a magnitude of 1.5 m/s2. What is the magnitude of the friction force on the block that slides horizontally? Disregard any pulley mass or friction in the pulley and let the mass of the small block be  = 2.0 kg. The two other blocks have double this mass.

A pop gun uses a standard spring compressed by an amount to fire a projectile of mass to a height by firing at a velocity of . If we would like to have the projectile go one third as high, what spring compression is required?

Suppose you are talking by interplanetary telephone to a friend, who lives on the Moon. He tells you that he has just won a newton of gold in a contest. Excitedly, you tell him that you entered the Earth version of the same contest and also won a newton of gold! Who is richer?

A ball is dropped from a height on a frictionless loop-de-loop of radius = m. What is the smallest that can be where the ball makes it around the track without losing contact? Please give your answer in units of m.