Questions from Modern Physics

Q: A proton with mass 1.67 × 10-27 kg

A proton with mass 1.67 × 10-27 kg is propelled at an initial speed of 3.00 × 105 m/s directly toward a uranium nucleus 5.00 m away. The proton is repelled by the uranium nucleus with a force of magni...

Q: You are asked to design spring bumpers for the walls of a

You are asked to design spring bumpers for the walls of a parking garage. A freely rolling 1200-kg car moving at 0.65 m/s is to compress the spring no more than 0.090 m before stopping. What should be...

Q: You and your bicycle have combined mass 80.0 kg.

You and your bicycle have combined mass 80.0 kg. When you reach the base of a bridge, you are traveling along the road at 5.00 m/s (Fig. P6.74). At the top of the bridge, you have climbed a vertical d...

Q: A 2.50-kg textbook is forced against a horizontal

A 2.50-kg textbook is forced against a horizontal spring of negligible mass and force constant 250 N/m, compressing the spring a distance of 0.250 m. When released, the textbook slides on a horizontal...

Q: The spring of a spring gun has force constant k = 400

The spring of a spring gun has force constant k = 400 N/m and negligible mass. The spring is compressed 6.00 cm, and a ball with mass 0.0300 kg is placed in the horizontal barrel against the compresse...

Q: One end of a horizontal spring with force constant 130.0

One end of a horizontal spring with force constant 130.0 N/m is attached to a vertical wall. A 4.00-kg block sitting on the floor is placed against the spring. The coefficient of kinetic friction betw...

Q: One end of a horizontal spring with force constant 76.0

One end of a horizontal spring with force constant 76.0 N/m is attached to a vertical post. A 2.00-kg block of frictionless ice is attached to the other end and rests on the floor. The spring is initi...

Q: A crate slides up an inclined ramp and then slides down the

A crate slides up an inclined ramp and then slides down the ramp after momentarily stopping near the top. There is kinetic friction between the surface of the ramp and the crate. Which is greater? (i)...

Q: When a car stops suddenly, the passengers tend to move forward

When a car stops suddenly, the passengers tend to move forward relative to their seats. Why? When a car makes a sharp turn, the passengers tend to slide to one side of the car. Why?

Q: A 5.00-kg block is moving at v0 =

A 5.00-kg block is moving at v0 = 6.00 m/s along a frictionless, horizontal surface toward a spring with force constant k = 500 N/m that is attached to a wall (Fig. P6.79). The spring has negligible m...