Other Physics Answers

A mass of 2.3 kg is initially moving at 5 m/s. A constant force of 15N is applied to the mass for 6 seconds. Find (a) the initial momentum, (b) final momentum.

The 60 kg block A and 20 kg block B are connected by a rope as shown in Figure 2 with the friction coefficients μs = 0.25 and μk = 0.20. 

1. Draw the free body diagram for each block.

b) If the weight of block B is unknown, determine the range of tension exerted on the rope to maintain the block from moving. 

c) If weight of block A is increased by 50%, determine whether the system is still in equilibrium. 

Calculate the force exerted by mars on its moon Phobos and the force exerted by Phobos on mars . The mass of mars is 6.4 x 1023 kg and the mass of Phobos is 1.06 x 1016kg. The distance between bars and the Phobos centers of mass is 9.38 x 106 m

3. A wave is represented by the equation y(x,t) = 1.2(cm) cos [4π(rad/m)x – 200(rad/s)t].

Find

(a) The transverse displacement of a particle of the medium at x = 2 m and at t = 2 s.

(b) The transverse velocity of the particle of the medium at the same position and time.

(c) The transverse acceleration at the same position and time.

(d) The propagation velocity of the wave.

Calculate the force exerted by mars on its moon Phobos and the force exerted by Phobos on mars . The mass of mars is 6.4 x 1023 kg and the mass of Phobos is 1.06 x 1016kg. The distance between bars and the Phobos centers of mass is 9.38 x 106 m

1.    What is the angular acceleration of a ball that starts at rest and increases its angular velocity uniformly to 5 rad/s in 10 s? 

What is the angular velocity of an object traveling in a circle of radius 0.75 m with a linear speed of 3.5 m/s?

1. Mark bought a pizza of a radius of 0.5 m. A fly lands on the pizza and walks around the edge for a distance of 80 cm. Calculate the angular displacement of the fly? 

A 25.0 kg door is 0.925 m wide. A customer pushes it perpendicular to its face with a 19.2 N force, and creates an angular acceleration of 1.84 rad/s2. At what distance from the axis was the force applied?

As the depth of liquid decreases the pressure?