Exam 11: Energy in Thermal Processes Heat and Internal Energy: Part A

A car with bad shocks bounces up and down with a period of 1.50 s after hitting a bump.The car has a mass of 1250 kg and is supported by four springs of force constant k.What is k for each spring?

Doubling the weight suspended vertically from a coil spring will result in a change in the displacement of the spring's lower end by what factor?

A 2.0 cm 2)0 cm steel rod of length 80 cm has its left end clamped and a force of Applied perpendicular to its length at its right end.By how much does the right end shift from its original position? For steel Young's modulus is ,the bulk modulus is ,and the shear modulus is )

How large a force is necessary to stretch a 2.0 mm radius steel wire (Y = 2.0 × 10¹¹ N/m²)by 2.0%?

A simple pendulum has a mass of 0.50 kg and a length of 1.0 m.It is displaced through an angle of 30° and then released.After a time,the maximum angle of swing is only 10°.How much energy has been lost to friction?

If a long spring with spring constant k is cut into 3 equal lengths,what is the spring constant of each of the 3 shorter springs?

A mass of 4.0 kg,resting on a horizontal,frictionless surface,is attached on the right to a horizontal spring with spring constant 30 N/m and on the left to a horizontal spring with spring constant 50 N/m.If this system is moved from equilibrium,what is the effective spring constant?

A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 4.0 cm.If a timer is started when its displacement is a maximum (hence x = 4 cm when t = 0),what is the speed of the mass when t = 5 s?

A 0.20-kg block rests on a frictionless,level surface and is attached to a horizontally aligned spring with a spring constant of 80 N/m.The block is initially displaced 4.0 cm from the equilibrium point and then released to set up a simple harmonic motion.A frictional force of 0.3 N exists between the block and surface.What is the speed of the block when it passes through the equilibrium point after being released from the 4.0-cm displacement point?

A mass-spring system on a horizontal frictionless surface is set in simple harmonic motion with amplitude A.The mass is then doubled and the system is again set into simple harmonic motion with the same amplitude.Which of the following is true about the total mechanical energy of the system due to doubling the mass?

A tiny spring,with a spring constant of 1.20 N/m,will be stretched to what displacement by a 0.0060-N force?

A simple pendulum has a period of 1.0 s.What is the pendulum length? (g = 9.8 m/s²)

Suppose a 0.30-kg mass on a spring that has been compressed 0.10 m has elastic potential energy of 1.5 J.What is the spring constant?

A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm.If a timer is started when its displacement from equilibrium is a maximum (hence x = 8 cm when t = 0),what is the displacement of the mass when t = 3.7 s?