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A 300kg block start at rest from the top of 30° incline and accelerate uniformly down the incline ,moving 20m in 1.50s. (a)Find the magnitude of the acceleration of the block .(b)find the coefficient of friction between the block and the incline .(c)Find the magnitude of the frictional force acting on the block.(d)Find the speed of the block after it has slide a distance of2.00m.[g=9.8ms squared]
b) A matter has a body-centered cubic unit cell with a length of 330 pm along an edge
and a density of 8.57 g cm^-3. Calculate the atomic mass of the matter.
c) Find the total energy of a moving object of mass 6.3 kg and momentum 11.5 x 10 kgms^-1
5. c) Find the total energy of a moving object of mass 6.3 kg and momentum 11.5 x 10 kgms^-1
5. b) A matter has a body-centered cubic unit cell with a length of 330 pm along an edge
and a density of 8.57 g cm^-3. Calculate the atomic mass of the matter.
3. c) A wire of length 7 m and radius 2.37 mm is stretched by a load of 12370 gm and increased by 1.78% of the original length. Find the stress, strain, and Young's modulus of the material of the wire.
2. c) A capillary tube with an inside radius of 638 nm can support a 100 mm column of liquid that has a density of 820 kgm3. The observed contact angle is 12.5°. Find the surface tension of the liquid for h= 20 cm.
1. c) The radius of a silver bar is 30 cm. What force is required to stretch the bar by 12.7% of its length where Young's modulus is Y = 7.25 x 10¹0 Nm-².
The driver of a 2.0 × 103 kg red car traveling on the highway at 45m/s slams on his brakes to avoid striking a second yellow car in front of him, which had come to rest because of blocking ahead as shown in above Fig. After the brakes are applied, a constant friction force of 7.5 × 103 N acts on the car. Ignore air resistance.
(a) Determine the least distance should the brakes be applied to avoid a collision with the other vehicle?
(b) If the distance between the vehicles is initially only 40.0 m, at what speed would the collision occur?
(c) Write your conclusive observations on the result obtained from this numerical. i.e. the importance of Physics in daily life.
The driver of a 2.0 × 103 kg red car traveling on the highway at 45m/s slams on his brakes to avoid striking a second yellow car in front of him, which had come to rest because of blocking ahead as shown in above Fig. After the brakes are applied, a constant friction force of 7.5 × 103 N acts on the car. Ignore air resistance.
(a) Determine the least distance should the brakes be applied to avoid a collision with the other vehicle?
(b) If the distance between the vehicles is initially only 40.0 m, at what speed would the collision occur?
(c) Write your conclusive observations on the result obtained from this numerical. i.e. the importance of Physics in daily life.
Consider an automobile moving at v mph that skids d feet after its brakes lock. Calculate how far it would skid if it was moving at 2v and the brakes were locked.
