a man is trying to move a piano by himself, but it will not move, what force must they overcome to start the piano moving?

A concave lens of power - 2D is placed in contact with a convex lens of power + 1.5D what will be the resultant power

The angular velocity of a flywheel obeys the equation ωz (t) = A+Bt2, where t is in seconds and A and B are constants having numerical values 2.65 (for A) and 1.60 (for B). Required: a. What are the units of A and B if ωz is in rad/s? b.

What is the most work that can be done with 100 joules if energy

Assume that a 15-kg ball moving at 8 m/s strikes a wall perpendicularly and rebounds elastically at the same speed. What is the amount of impulse given to the wall?

What are the three categories of adult development?

Two football players collide on the field. Before the collision, their total momentum was 450 kgm/s to the north. What is their total momentum after the collision? A. More than 450 kgm/s north B. 450 kgm/s north C. Less than 450 kgm/s north D.

Jane and John Doppler effect

If you combine 430.0 ml of water at 25.00 °c and 140.0 ml of water at 95.00 °c, what is the final temperature of the mixture? use 1.00 g/ml as the density of water. s

While working out, a man performed 200 j of work in 3 seconds. What was his power?

A funnel-shaped low pressure closure