Questions from Modern Physics

Q: Two metal disks, one with radius R1 = 2.50

Two metal disks, one with radius R1 = 2.50 cm and mass M1 = 0.80 kg and the other with radius R2 = 5.00 cm and mass M2 = 1.60 kg, are welded together and mounted on a frictionless axis through their c...

Q: A lawn roller in the form of a thin-walled,

A lawn roller in the form of a thin-walled, hollow cylinder with mass M is pulled horizontally with a constant horizontal force F applied by a handle attached to the axle. If it rolls without slipping...

Q: Two weights are connected by a very light, flexible cord that

Two weights are connected by a very light, flexible cord that passes over an 80.0-N frictionless pulley of radius 0.300 m. The pulley is a solid uniform disk and is supported by a hook connected to th...

Q: You complain about fire safety to the landlord of your high-

You complain about fire safety to the landlord of your high-rise apartment building. He is willing to install an evacuation device if it is cheap and reliable, and he asks you to design it. Your propo...

Q: When a tall, heavy refrigerator is pushed across a rough floor

When a tall, heavy refrigerator is pushed across a rough floor, what factors determine whether it slides or tips?

Q: A yo-yo is made from two uniform disks, each

A yo-yo is made from two uniform disks, each with mass m and radius R, connected by a light axle of radius b. A light, thin string is wound several times around the axle and then held stationary while...

Q: A thin-walled, hollow spherical shell of mass m and

A thin-walled, hollow spherical shell of mass m and radius r starts from rest and rolls without slipping down a track (Fig. P10.68). Points A and B are on a circular part of the track having radius R....

Q: A basketball (which can be closely modeled as a hollow spherical

A basketball (which can be closely modeled as a hollow spherical shell) rolls down a mountainside into a valley and then up the opposite side, starting from rest at a height H0 above the bottom. In Fi...

Q: A solid uniform ball rolls without slipping up a hill (Fig

A solid uniform ball rolls without slipping up a hill (Fig. P10.70). At the top of the hill, it is moving horizontally, and then it goes over the vertical cliff. (a) How far from the foot of the cliff...

Q: A solid, uniform, spherical boulder starts from rest and rolls

A solid, uniform, spherical boulder starts from rest and rolls down a 50.0-m-high hill, as shown in Fig. P10.71. The top half of the hill is rough enough to cause the boulder to roll without slipping,...