In the figure provided, three balls of equal masses are released from the ground. If they are released with equal speeds, which ball has the largest speed when it hits the dotted line? They all have the same speed. Ball a has the largest speed. Ball b has the largest speed. Ball c has the largest speed.

calculate the train's final speed and energy lost with these numbers.  A train car hits a three-car train; together, it becomes a four-car train. The mass of each train car is 40*103 kg. The initial speed of the single car is 3.3 m/s. The initial speed of the three-car train is 1.8 m/s.

A car weighing 1.2 tons. Its engine generates a force of 2000 Newtons. Take enough time to reach a speed of 27 m/s 1.67 O 1.27 O 10 1.57 O

Releasing some frustration at the end of the semester, you throw your physics book (mass of 4.3 kg) off of a 24 m tall building. You throw your book so that it has a speed of 3 m/s right after you let go. What is the kinetic energy of your book after you let go? (in J) 12.9 1.01×103 206 0 19.4 How how fast is your textbook moving right before it lands? For now, ignore friction. (in m/s) 21.9 17.5 24.7 21.5 If friction is NOT negligible, and 350 J of the textbook's energy is converted to thermal energy as it falls, how fast is it moving just before it lands? (in m/s) 17.8 17.5 12.8 25.3 25.0

A tennis ball bouncing on a hard surface compresses and then rebounds. The details of the rebound are specified in tennis regulations. Tennis balls, to be acceptable for tournament play, must have a mass of 57.5 g. When dropped from a height of 2.5 m onto a concrete surface, a ball must rebound to a height of 1.4 m. During impact, the ball compresses by approximately 6 mm. How fast is the ball moving when it hits the concrete surface?(Ignore air resistance.)A. 5 m/s            B. 7 m/sC. 25 m/s          D. 50 m/s

5. A skateboard artist is sliding down a street at constant speed of 7 m/s when he reaches a greasy stretch on which his skateboard moves with negligible friction. If the greasy stretch is 12 m high, what is the skateboard artist's speed at its bottom?

Mitch throws a 52-gram lump of clay at a 475 g target, which is at rest on a horizontał surface. After impact, the target slides 4 m before stopping. If the coefficient of friction is 0.48, find the speed of the clay before impact.

When the 5-kg box reaches point A it has a speed VA = 12 m/s. (Figure 1) Figure ( 1 of 1 y=x 9 m B 9 m