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In order to catch a ball, a baseball player naturally moves his or her hand backward in the direction of the ball’s motion once the ball contacts the hand. This habit causes the force of impact on the players hand to be reduced in size principally because ___.

The length and width of a rectangle are 1.125 m and 0.606 m, respectively.  Multiplying, your calculator gives the product as 0.68175.  Rounding properly to the correct number of significant digits, the area should be written as

A 1.0-kg ball falls to the floor. When it is 0.70 m above the floor, its potential energy exactly equals its kinetic energy. How fast is it moving?

Particles 1, with charge q1, and 2, with charge q2, are on the x axis, with particle 1 at x = a and particle 2 at x = −2a. For the net force on a third charged particle, at the origin, to be zero, q1 and q2 must be related by q2 =:

The displacement versus time for a certain particle moving along the x axis is shown. In the time interval from 4 to 5 s the particle is:

A projectile is launched with an initial velocity of 60.0 m/s at an angle of 30.0° above the horizontal.  How far does it travel?

A wheel of radius 1.0 m is rotating with a constant angular speed of 2.0 rad/s.  What is the centripetal acceleration of a point on the wheel’s rim?

 In other space, a bowling ball and a ping-pong ball attract each other due to gravitational forces.  How do their accelerations compare?

Determine the number of significant digits in the number 200.02.

A projectile in flight explodes into several fragments.  The total momentum of the fragments immediately after this explosion: