Classical Mechanics Answers

Write expression for gravitational acceleration at h height.

Write first law of kepler.

Jamal pulls a 150N sled up a 24° slope at constant speed by a force of 100N. Near the top of hill , he releases the sled. With what acceleration does the sled go down the hill?

A car is moving with acceleration 5m/sec2 from rest. Find it's speed at t= 2 sec.

A student taking a quiz finds on a reference sheet the two equations f = 1 / T and =square root of (1/T).
She has forgotten what T represents in each question.
Use dimensional analysis to determine the units required for T in each question.
Explain how you can identify the physical quantity each T represents from the units.

A person standing on the edge of a high cliff throws a rock straight up. The rock misses the edge of the cliff as it fall back to earth in 7s. The rock attains maximum height at t = 1.5 s. What is the height of the cliff? What is the total distance travelled?

A triangle has vertices at A(2,3,1) , B(-1,1,2) , C(1,-2,3).Find the acute angle which the median to side AC makes with side BC

Two particles each of rest mass m collide head-on and stick together. Before collision, the
speed of each mass was 0.6 times the speed of light in free space. The mass of the final
entity is

a train travels in 3 minutes a distance of 3.15 km from rest at one station to another station. It is uniformly accelerated for the first 30 seconds and uniformly retarded for the last 15 seconds, the speed being constant for the remaining time. Find maximum velocity, acceleration and retardation. Use v-t graph to solve the problem.