Mechanics | Relativity Answers

Safawi kicked a ball with an initial speed of 20 ms^-1 at 30^º angle. If the ball experienced a constant vertical acceleration of -9.81 ms^-2, calculate the ball’s maximum height and distance. Explain how soccer player could apply the force of summation theory to optimize his kicks performance.

Two rugby players run towards each other and have an inelastic collision. Given the mass 70 kg and 60 kg respectively, and velocity 3 ms^-1 and 4 ms^-1. Calculate the final velocity and its direction of the respective players. Discuss how a rugby player’s bone develops if continuously performing the weight bearing exercise using Wolff’s Law and bone remodeling theory.

Safawi kicked a ball with an initial speed of 20 ms-1 at 30º angle. If the ball experienced a constant vertical acceleration of -9.81 ms-2, calculate the ball’s maximum height and distance. Explain how soccer player could apply the force of summation theory to optimize his kicks performance. 

Safawi kicked a ball with an initial speed of 20 ms-1 at 30o angle. If the ball experienced a constant vertical acceleration of -9.81 ms-2, calculate the ball’s maximum height and distance.

Safawi kicked a ball with an initial speed of 20 ms-1 at 30º angle. If the ball experienced a constant vertical acceleration of -9.81 ms-2, calculate the ball’s maximum height and distance. Explain how soccer player could apply the force of summation theory to optimize his kicks performance. 

Suppose that a person throws a ball upward at 15 m/s while standing on the edge of a cliff so that the ball can fall to the base of the cliff 50 m below.

a) How long does it take the ball to reach the base of the cliff?

b) What is the total distance covered by the ball.

Suppose that a person throws a ball upward at 15 m/s while standing on the edge of a cliff so that the ball can fall to the base of the cliff 50 m below. How long does it take the ball to reach the base of the cliff?

. A motorcycle of mass 100 kilograms travels around a flat, circular track of radius  10 meters with a constant speed of 20 meters per second. What force is required  to keep the motorcycle moving in a circular path at this speed?

The force stretching a string is proportional to the extension produced. Find the dimensions of the constant of proportionality

26' A vehicle starting its motion from rest travels at a uniform acceleration of 5ms-2 for a certain time and

travels with the attained uniform velocity for another certain period of time. Then it decelerates uniformly at

5ms-2 and stops after a certain time. If the total time spent is 25s and the average velocity for the whole

motion is 20ms-1 , find the time that the vehicle travelled at uniform velocity.