A dancer lifts a 200-kg barbell with an acceleration of 3 m/s2. How much force does the weightlifter use to raise the barbell

The number of times a machine multiplies the effort force is the what of the machine

What is the kinetic energy of a 150gram object moving at a velocity of 100m/s?

0.05 kg bullet collides and sticks to a 2.5 kg stationary block suspended from a string. the bullet and block swings to a maximum height of 12 cm. what was the initial speed of the bullet?

You drop a rock down a well that is 11.5 m deep. How long does it take the rock to hit the bottom of the well?

A helicopter, initially hovering 40 feet above the ground, begins to gain altitude at a rate of 21 feet per second.

Before designing the filter, one must understand the relationship between the output voltage of the circuit and the frequency. For a series RLC circuit, how do the impedances of the circuit elements depend on the frequency? a.

A ball rolls down an incline and off a horizontal ramp. Ignoring air resistance, what force or forces act on the ball as it moves through the air just after leaving the horizontal ramp? a). The weight of the ball acting vertically down.

How many atoms are in a sample of 1.83 moles of potassium (K) atoms? A) 3.04 * 10-24 atoms K B) 3.29 * 1023 atoms K C) 1.10 * 1024 atoms K D) 6.02 * 1023 atoms K

If a single mutation turns off the growth of some pairs of legs within an organism, what's most likely affected? a. A substituted gene b. A deleted gene c. A duplicated gene d. A Hox gene

car slows down from 20 m/s to rest in a distance of 85 m. What was its acceleration, assumed constant?