Questions from College Physics

Q: A projectile of mass m is fired horizontally with an initial speed

A projectile of mass m is fired horizontally with an initial speed of υ0 from a height of h above a flat, desert surface. Neglecting air friction, at the instant before the projectile hits the ground,...

Q: A horizontal spring attached to a wall has a force constant of

A horizontal spring attached to a wall has a force constant of 850 N/m. A block of mass 1.00 kg is attached to the spring and oscillates freely on a horizontal, frictionless surface as in Figure 5.22....

Q: A 50. - kg pole vaulter running at 10. m

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 air resistance, as well as any energy absorbed by the pole, and determine her al...

Q: In a perfectly inelastic one-dimensional collision between two objects,

In a perfectly inelastic one-dimensional collision between two objects, what initial condition alone is necessary so that all of the original kinetic energy of the system is gone after the collision?...

Q: A child and a sled with a combined mass of 50.

A child and a sled with a combined mass of 50.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 3.00 m/s at the bottom, what is the height of the hill?

Q: A 35.0 - cm long spring is hung vertically from

A 35.0 - cm long spring is hung vertically from a ceiling and stretches to 41.5 cm when a 7.50 - kg weight is hung from its free end. (a) Find the spring constant. (b) Find the length of the spring if...

Q: A 0.250 - kg block along a horizontal track has

A 0.250 - kg block along a horizontal track has a speed of 1.50 m/s immediately before colliding with a light spring of force constant 4.60 N/m located at the end of the track. (a) What is the spring’...

Q: A block of mass m = 5.00 kg is released

A block of mass m = 5.00 kg is released from rest from point Ⓐ and slides on the frictionless track shown in Figure P5.36. Determine (a) The block’s speed at points...

Q: Tarzan swings on a 30.0 - m - long vine

Tarzan swings on a 30.0 - m - long vine initially inclined at an angle of 37.0° with the vertical. What is his speed at the bottom of the swing a) If he starts from rest? (b) If he pushes off with a...

Q: Two blocks are connected by a light string that passes over a

Two blocks are connected by a light string that passes over a frictionless pulley as in Figure P5.38. The system is released from rest while m2 is on the floor and m1 is a distance h above the floor....