Mechanics | Relativity Answers

Kyle is driving his car at 15 m/s when he noticed that he is approaching a stalled truck that is approximately 35m away . He steps on the brakes and the car stops 1.0 m away from the stalled truck . At what rate did the car slow down ? Assume that Kyle's reaction time is 0.20s . Reaction time is the time for a person to notice , think and act in response to a given situation .

two insect A( -3,2,0) and B(1,1,-3) fly towards a point C(0,2,0) at the same speed.which will arrive first

A large gun fires a shell with a muzzle velocity of 400m/sec. What is the renge of the gun when it is elevated at an angle of: 30? and 50?

How far will a jumper go if he accelerates to 11.0 m/sec and jumps at an angle of 30

Below is a lift at Gugulethu mall depicted. The lift travels from the ground floor to the
eighth floor as shown. You have made studies during its installation and found out that
the cable has a mass of 6.3 kg/m. The lift cage has a mass of 750 kg and there are
three people in the lift, two weighing 75 kg each. The third person is you. Answer the
following questions without neglecting the weight of the third person in the lift

What is the area of a circle with circumference = 10 meters?

A shopper pushes her 25 kg grocery cart by a force of 225 N inclined at an
angle of 60° with the horizontal through a distance of 7.5 m as shown in the
free body diagram. Find the work done by (a) the 225 N force and (b) friction.
Assume that the coefficient of kinetic friction is 0.32.

prove that the distance between two points is invariert under gyalilean transformation

A force of 300 N acts on a 2.5 m long and 10 kg rod initially at rest as shown in the picture below. What is the torque acting on the rod?

What is the gratest acceleration that can be generated by a runner if the coefficient of statics friction between the shoez and road is 0.95?