Mechanics | Relativity Answers

if you give a golf ball an intial speed of 130 mph at an angle of 60 degrees,
a. how far will the ball travel assuming level ground?
b. how long will it take the ball to come back down to the ground?
c. what is the peak height of the ball?
d. how far will the ball travel if it is hit from a 20 m cliff?

If you throw an object directly above yourself, what is the acceleration of the object
a. on the way up?
b.At the top?
c. On the way down?

if you leave your home and drive at a speed of 55 mph for 1.5 hours 60 degrees North of East, then 40 mph for 3 hours 10 degrees East of North, what is your net displacement from home? give your answer in miles with an angle

if you drop a bowling ball from a bridge and it takes 4.7 s to reach the water, how far above the water did you drop the ball?

If a car ca accelerate at 4.3m/s[sup]2[/sup], how far will it have to travel from rest to reach a speed of 28 m/s?

Hello,
I have the following question:

Why is it supposed to be impossible to generate energy from gravity? I see the force of gravity as a loose force that could be harnessed to generate useful mechanical energy. Why is this supposed to be impossible? I have struggled with this problem for many years and I would like an in depth analysis that would help me understand the scope of this problem.

Friendly,

Jean-pierre

For the intercontinental ballistic missile to have a range of 10000 km, what must be the speed v0 of the missile at the end of the acceleration phase? Take the distance of the acceleration phase, called the boost time, as negligible compared to the travel time. Answer in units of km/s

You shoot a projectile at an unknown angle but at a velocity of 15m/s. You know that this must hit a target 20 feet away (height of the target negligible). What is the time of the flight and how do you get it.

is screw force the same as screw torque? explain.

a solid sphere,spherical shell, solid cylinder and a cylindrical shell all have the mass m and radius R. if they are all released from rest at the same elevation and roll without slipping, which reaches the bottom of an inclined plane first?