Question

Locusts can jump to heights of 0.660m. (a). Assuming the locust jumps straight up, and ignoring air resistance, what is the takeoff speed of the locust? (b). The locust actually jumps at an angle

Question

1.A sprinter starting from rest on a straight, level track is able to achieve a speed of 12 m/s in 6.0 s. What is the sprinter’s average acceleration? 2.Modern oil tankers weigh more than a half-million tons and have

A certain star of radius 7.34 million meters, rotates 125 times around its axis in 240 hours. This star has a mass of 1.00×1032 kg. When this star collapses to a neutron star, its radius shrinks by a factor of 104 but it loses 30%

A copper wire of mass 25.6 g and length 3.56m is spanned between two clamps. A tension of 5000 N is applied to it. (a) Find the speed of a wave in the wire. (b)Assume the amplitude is 1.25 cm. Find the maximum acceleration of

You heat a 507 cm3 sample of a substance from 133°C to 281°C and find that its volume increases by 2.29 cm3. Calculate the coefficient of volume expansion of this substance.

A pendulum clock loses 25.80 s every day. What fractional change ΔL/L must be made to the length L of the pendulum so that the clock keeps perfect time?

A flat horizontal square rocket launchpad is supported by a large column at each corner. Each side of the square faces one of the cardinal directions, North, East, South, West. Each side is 15 meters in length. The launch pad is 75,000 kg in mass.

A student wants to place a flower pot on a board that juts out from a window so it will get more sunlight (Fig. 11-28). The flower pot has a mass of 3.9 kg and needs to be 65 cm from the window sill. The

A skater twirls at 1.0 rev/s with her arms extended and holds a 3 kg mass in each hand; each mass is 0.8 m from the axis of rotation. She pulls the masses in along the radial direction until they are 0.4 m from the

A diver comes off a board with arms straight up and legs straight down, giving her a moment of inertia about her rotation axis of 18kg⋅m^2. She then tucks into a small ball, decreasing this moment of inertia to 3.6kg⋅m^2. While tucked, she makes two