A 50. - kg pole vaulter running at 10. m/s vaults over the bar.Her speed when she is above the bar is 1.0 m/s. Neglect airresistance, as well as any energy absorbed by the pole, anddetermine her altitude as she crosses the bar.

A spring clamped to the table shoots Block 1 (110 g, wood) directly into Block 2 (80 g, steel), this perfectlyelastic collision will launch the second block up a ramp. When the spring is compressed 14 cm, the block travels upa ramp that has a height of 86 cm and then compresses another spring (310 N/m) at the top, 5 cm. What then isthe spring constant for the first spring? Assume that all surfaces are frictionless

A car's bumper is designed to withstand a 5.76 km/h (1.6-m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a bumper that collapses 0.210 m while bringing a 890 kg car to rest from an initial speed of 1.6 m/s.

A glider is placed at the top of an air track that is tilted at an angle of 7.7º from the horizontal. If the glider is then let go (from rest), what is its speed at the instant it has glided 0.275 mm along the track?

3. A body loses 5693 J of potential energy in falling through 65.5 m. Calculate the mass of the body. (The acceleration due to gravity is 9.81 m/s) fot

It will launch a 25 g projectile to a range of 2.15 m when it is launched at an angle of 45 degrees. You can use this information to find the initial velocity of the ball, of course, (and you should). Therefore, you should be able to calculate how much energy the spring in the projectile launcher must impart to the ball as it is being launched. The ball is pushed back 7.5 cm in the projectile launcher in order to getit ready to fire. What is the spring constant of the projectile launcher?

A cars bumper is designed to withstand a 4.0km/h (1.1 -m/s) collision with an immovable object without damaging the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a bumper that collapses 0.185m while bringing a 875kg car to rest from an initial speed of 0.85m/s in newtons.