Classical Mechanics Answers

A 10Mg truck rolling at a constant speed of 30 kph along a horizontal rail comes to an incline of slope sin 0.1. Calculate how far it will coil up the slope before coming to a halt, (a) ignoring all resistive forces, and (b) assuming the rolling vesistance is 5% of the normal reaction of the truck

A 5kg weight whose motion is constrained by vertically guides is dropped from rest 0.5m onto vertically aligned spring whose stiffness is 10kNm-¹. how fast is the weight travelling when the spring has been compressed by 50mm?

A balloon is rising vertically upward with a uniform

velocity 'u' as shown in Fig. 11.E22. At a certain

instant, a ball No. 1 is dropped from it, which takes a

4 sec to reach the ground. The moment this ball

strikes the ground, another ball is dropped from the

balloon and this 2nd ball takes 5 sec to reach the

ground. Find the velocity of the balloon 'u' and height

from which both the balls must have been dropped.

Objects with masses of 200kg and 500kg are separated by 0.4m

Find

a)the net gravitational force exerted by these objects on a 50kg object placed midway between them

b) at what position can the 50kg object be placed so as to experience a net force of zero

An object slides down at the top of a hill starting from rest it takes 8 seconds to slide down 100 meters at an angle of 60. Then what will be the coefficient of kinetic friction?

During a time interval of 90 minutes a car

(a) Runs at 50 km/hr for the first 20 min,

(b) Accelerates uniformly to 90 km/hr for the next 10 min,

(e) Runs at the speed of 90 km/hr in the next 40 min, and (d) Decelerates uniformly to a stop in the remaining 20 min.

Calculate the (a) acceleration (b) deceleration (e) average speed during entire period.

Tom who is traveling at a speed of 67 km/hr sees Jerry 178 m away on the road. What is the minimum constant acceleration must Tom have to avoid Jerry assuming he doesn't move.

A 10Mg truck rolling at a constant speed of 30 kph along a horizontal rail comes to an incline of slope sin 0.1. Calculate how far it will coil up the slope before coming to a halt, (a) ignoring all resistive forces, and (b) assuming the rolling vesistance is 5% of the normal reaction of the truck

5kg weight who mation is constrained by vertical guides is dropped from reit 0.5 m onto a vertically aligned spring whose stiffness is 10 Nm How fast is the weight travelling when the spring has been compressed by 50 mm

A cube of mass 10 kg is at rest on a horizontal surface when it is subjected to a horizontal force P that varies with time t as P = 20t. If the static and kinetic coefficients of friction are both 0.4, calculate the velocity of the cube after 5 s.