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1-A car of mass m drives at speed v over a hill with radius of curvature r.
(a) Draw a free body diagram of the car at the top of the hill.
(b) Find the normal force N on the car at the top of the hill.
2-A cart of mass m has initial velocity v0 pointing to the right. A constant net force F also pointing right acts on the cart from time t0= 0 to tf.
(a) Graph the cart's momentum versus time from t0= 0 to tf.
(b) Find the cart's final velocity vf at time tf
3- When a 2 kg mass is placed on a spring scale in equilibrium, the springAc€?cs height is compressed to 8 cm. When a 3 kg mass is placed on the same spring scale, the spring's height is compressed to 7 cm.
(a) What is the height of the spring with no mass on it?
(b) Graph the spring force verses compressed height from 10 cm to 7 cm.
A cement block accidentally falls from rest from the ledge of a 70.0 -m-high building. How much time, at most, does the man have to get out of the way
A solid sphere with mass m = 1.5 kg a radius r = 0.20 m rolls without slipping on a flat surface with an angular velocity of ? = 7.2 rad/s. What is the total kinetic energy of the sphere
a particle beam is made up of many protons each with a kinetic energy of 3.25times10-15j. a proton has a mass of
An asteroid is discovered heading straight toward Earth at 15km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 min, after which the asteroid is moving at 29degree to its original path at a..
You have a 1.99-m-long stretched string with a mass of 19.5 g. When you oscillate the string at 440 Hz, Calculate the tension in the string
Light of a wavelength 610nm is incident on a slit of 0.20mmwide and the diffraction pattern is produced on a screen that is1.5m from the slit. What is the width of the central maximum
Leigh is doing a knee extension exercise using a 100 N dumbbell strapped to her ankle 40 cm from her knee joint. For this position, what torque is created by the dumbbell about her knee joint axis
A fire engine moving to the right at 40 m/s sound its horn (frequency = 500 Hz) at the two vehicles shown in the figure. The car is moving to the right at 30 m/s, while the van is at rest. (a) What frequency is heard by the passenger in the car?
A cyclotron is sometimes used for carbon dating. Carbon-14 and carbon-12 ions are obtained from a sample of the material to be dated and are accelerated in the cyclotron. If the cyclotron has a magnetic field of magnitude 2.50 T, what is the diffe..
Three point charges are arranged along the x axis. Charge q1=-4 nC is located at x=0.240m and charge q2=2.10 nC is at x=-0.350m, What is the direction of the net force on q3
A girl is using a rope to pull a box that weighs 300 N across a level surface with constant velocity. What is the friction force of the floor on the box
A 2.20 kg frictionless block is attached to an ideal spring with forces constant 314N/m. At first the block has velocity -3.60 m/s and displacement 0.300-m.
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