Can't find the options on the keyboard so ill try to describe it. I think either an He symbol or the greek letter alpha is accepted. There must be a 4 at the top left and a 2 at bottom left.

3 0

3 years ago

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The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by

AlekseyPX

Hdbdndsnwkwowpprototkgncncncnf

3 0

4 years ago

Beginning at time t = 0, a student exerts a horizontal force on a box of mass 30 kg, causing it to move at 1.2 m/s toward an ele

Alexandra [31]

Since the initial and the final velocity are just equal, it is implied that the acceleration is zero. This means that the net force acting on the body is also zero. The horizontal force should be equal to the force of friction. The force of friction is equal to the product of the coefficient and the normal force.

Ff = (coefficient of friction) x Fn

The normal force is equal to the object's weight if the surface is horizontal.

Ff = (0.20) x (30 kg) x (9.8 m/s²) = 58.8 N


Thus, the horizontal force exerted must be 58.8 N.

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6 0

3 years ago