Mechanics | Relativity Answers

You are to drive to an interview in another town, at a distance of 320 km on an expressway. The interview is at 11:15 a.m. You plan to drive at 100 km/h, so you leave at 8:00 a.m. to allow some extra time. You drive at that speed for the first 110 km, but then construction work forces you to slow to 42.0 km/h for 44.0 km. What would be the least speed needed for the rest of the trip to arrive in time for the interview?

Michael is driving his sports car at 30 m/s when he sees a dog on the road ahead. He slams on the brakes and comes to a stop in 2.0 seconds. What was the acceleration of Michael's car?

A spring of natural length L extends to a new length L' under tensile force. If Hooke's law applies, the work done in stretching the spring is .........?

A car accelerates from rest at a constant rate 'A' for sometime, after which it retards at a constant rate 'B' to come to rest. If the total time lapse is T seconds, evaluate the maximum velocity reached and total distance travelled , in terms of 'A', 'B' & 'T'?

An object of mass m has a speed v, as it passes through the origin on its way along +x-axis. It is subjected to a retarding force given by F= -Ax. Here A, is a positive constant. Find its x-coordinate when it stops.

What is the diffrence between elastic potential energy and spring potential energy?

You are driving home from school steadily at 95 km/h for 180 km. It then begins to rain and you slow to 65 km/h. You arrive home after driving for 4.5 h. a) how far is your hometown from school? b) what was your average speed?

If you are driving 95 km/h along a straight road and you look to the side for 2.0 s, how far do you travel during this inattentive period?

Two particles of each rest mass 3x10(to the power -25) kg approaching each other in head on collision. If each particle has an initial velocity of 2x10(to the power 8) m/s, calculate the velocity of one particle as run by the other

0•2 kg mass of body suspended by 1 meter length of string if we displaced the body by using force at which the string make 30. Degree angle with horigontal then find the work done against with gravity