Physics Answers

A box made of steel that is filled with water has a length of 155 meters and a width of 25 meters and on top, a piece of wood is floating that has a mass of 135 million kilograms. What would the depth of the water line be? it also floats in saltwater (density= 1030 kg/m^3)

an object moves according to the position time graph shown above. For each of the following indicate and justify your answer with specific reference to the graph.

How fast is the 5.00 kg pumpkin from the previous question moving when it is 1.00 m above the ground (before it hits)?

Solve the problems below and show the complete solution.

What is the f of the pendulum on a clock with a L = 5.00 cm long?
f = (1 / 2π) √ (L / g)

The time of flight of projectile motion is given by the expression?

An athlete kicks a ball at an angle of 45° and with a speed that gives it a range of 60 m. The ball takes 2.8 s to land. If the athlete kicks another ball with the same speed, but at an angle between 45° and 55°, which of the following must occur the second time compared to the first time?

Tarzan wishes to use a light vine to swing from the ground onto a tree branch 3.5m high. How fast should he be going when he grabs the vine?

A man stands at the edge of a cliff and hits a golf ball into the ocean 101 m below. He hits the ball 38.5 m/s at an angle of 10 degrees above horizontal. Ignoring air resistance, how far does the ball travel horizontally before plunging into the ocean?

A woman walks at 2.1 m/s due East. After 199 seconds, she changes her direction by 20° to the South at 2.9 m/s for 187 seconds. What is the distance between where she started and where she ended?

A boat attempts to travel straight across to the other side of a river. The boat can go 18 m/s and the river travels at 17 m/s. At what angle (to the nearest degree) does the boat need aim upstream to dock exactly on the other side of the river?