1. Allison is walking along the beach and sees a sand castle. She wants to place something on top of the sand castle, but she is worried about putting too much force on it. If she puts too much force on the sand castle, it will break. It takes 5000 N to smash the sand castle. The pressure of the items she places on the sand castle is 1200 Pa and the area of the sand castle is 2m * 3m . Does Allison break the sand castle? Explain why based on your calculations. 2. Pisces V is a three-person submersible that can operate at and dive to depths of 1981 meters. What is the pressure (in pascals) on Pisces V at its greatest depth?

3. A statue of a great baseball player weighs 2400 N and has a base that is 4m * 2m . What is the pressure the statue exerts on the floor?

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Why does it dangerous to jump from a moving vehicle?

7.45 a student is interested in the aerodynamic drag on spheres. she conducts a series of wind tunnel tests on a 10-cm-diameter sphere. the air in the wind tunnel is at 50 â°c and 101.3 kpa. she presents the results of her tests in the form of a correlation, đť’ź = 0.0015v1.92, where đť’ź is the drag force in newtons and v is the velocity in m/s. another student realizes that the results would have been more effectively presented in terms of dimensionless parameters, say, î  1 = f (î  2) = c î  a2 , where î  1 and î  2 are dimensionless parameters and c and a are constants. what are the most appropriate dimensionless parameters (î  1 and î  2) and the corresponding values of c and a? what would be the drag on a 2-cm-diameter sphere placed in a 1-m/s, 20 â°c water stream?