You are holding a small helium balloon. Your friend says that the buoyant force from the atmosphere is greater on her car than your balloon. Is she correct? Explain your answer.
You are holding a small helium balloon. Your friend says that the buoyant force from the atmosphere is greater on her car than your balloon. Is she correct? Explain your answer.
A place kicker must kick a football from a point 39.6 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ground with a speed of 19.5 m/s at an angle of 53° to the horizontal.
A rocket is burning fuel at the rate of 300g/s and electing all the gas. In one direction of the rate of 500m/s what is maximum weight the rocket burn have if it going to move Vertically upward.
A cliff diver leaps horizontally at 3.0 m/s off a 20 m high cliff. What is the speed exactly 1.0 second later?
A pumpkin is dropped from the top of a Cilk Fm broadcasting tower. What is the pumpkin's velocity 3.00 s later?
You are holding a small helium balloon. Your friend says that the buoyant force from the atmosphere is greater on her car than your balloon. Is she correct? Explain your answer.
A dog pulls on a pillow with a force of 5.6 N at an angle of 39 degrees above the horizontal. Assume the x-axis of a reference frame is along the horizontal and the y-axis is along the vertical. Find the x and y components of the force.
A 7.5-cm-diameter horizontal pipe gradually narrows to 5.0 cm . When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 32.0 kPa and 24.0 kPa , respectively.
A particle moving uniformly along a curved path has a period of 0.24 s and a speed of 4.2 m/s. The radius of the path is? a. 16 cm b. 2.6 cm c. 1.0 m d. 0.062 cm
Suppose a woman wearing high-heeled shoes has a mass of 20 kg the area of each shoe is 10 cm2. How much pressure does she exert on the ground with both feet or with one foot? Explain your reasoning
Imagine that you are experimenting with two carts on an air track. Both carts have the same mass. You set cart A at rest on the track and slide cart B towards it with speed ( v ). Choose a possible outcome of the collision a) Cart A moving forward with speed v/2, cart B moving backwards with speed (v). b) Cart A at rest, cart B moving backwards with speed (v). c) Cart A moving forwards with speed 2v, cart B moving forwards with speed (v). d) Cart A moving forwards with speed (v), cart B at rest.
A record player disk base with a mass of 420 g rotates freely at an angular speed of 33 1/3 rpm. A 25 g mouse is initially riding on the rim of the disk, 15 cm from the center. If the mouse walks to the center of the disk, will the disk rotate faster, slower, or at the same rate? Explain. Calculate the angular speed of the disk when the mouse reaches the center.
