What is the net force acting on the piano

A uniform bridge span weighs 70 x 10^3 N and is 40 m long. An automobile weighing 15 x 10^3 N is parked with its center of gravity located 15 m from the right pier. What upward support force does the right pier provide?

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

What net external force is required to accelerate a 155kg automobile form rest to a speed of 100km/hr in 10 seconds?

Which most likely is a causal relationship?

A 70.0 kg ice hockey goalie, originally at rest, has a 0.110 kg hockey puck slapped at him at a velocity of 43.5 m / s. Suppose the goalie and the puck have an elastic collision, and the puck is reflected back in the direction from which it came.

If a ball is thrown vertically into the air in the presences of air resistance, would you expect the time during which it rises to be longer or shorter than the time during if falls?

The process of deformation due to plate movements that changes earth's surface is called

If the frequency of a sound wave is 250 hertz and its wavelength is 1.36 meters, what is the wave's velocity?

What will happen if I put my hand in a space vacuum.

You are exploring a distant planet. When your spaceship is in a circular orbit at a distance of 630 km above the planet's surface, the ship's orbital speed is 4900 m/s. By observing the planet, you determine its radius to be 4.48*106m.