Why is is important to measure the acceleration due to gravity and why does the value for the acceleration due to gravity change in different places?
Why is is important to measure the acceleration due to gravity and why does the value for the acceleration due to gravity change in different places?
An artillery shell is fired with an initial velocity of 300 m/s at 55° above the horizontal. To clear an avalanche, it explodes on a mountainside 42.0s after firing. Whar are the x- and y-coordinates...
- helium, carbon, gold - sodium, chromium, copper - iodine, iron, nickel -phosphorous, nitrogen, oxygen
If a cannonball was shot off 20 meters away from a soldier, and it's acceleration was 5m/s^2. What was the cannonball's final speed when it hit the soldier? Hint: The Initial speed...
If I were to draw a free body diagram on the "headless horseman" looking for his head, what forces would be acting upon it? Please label and explain. Thank you
Eli stands on the balcony of a tall building and throws a tennis ball straight up at a speed of 14 m/s. He releases the tennis ball at a height of 60m from the ground. In parts a through c, round...
The speed of the car is decreased uniformly from 30 m/s to 10 m/s in 4.0 seconds. What is its acceleration? A dancer moves 4 meters to the right of the stage in 10 seconds. What is his average...
A group of bikers from LA took 4-hour trip. For the first 3 hours, they traveled a total of 50 km, but during the last hour, they traveled only 10 km. What was the group's average speed for the entire...
Fred's car travels at a constant acceleration of 5 m/s2 from rest. How long will it have traveled by the time it reaches a velocity of 80 km/h?
John's car is travelling initially at 20km/h and his acceleration is 3.3km/hs. What is its final velocity after 3 hours?
A dragster and driver together have mass 902.2 kg. The dragster, starting from rest, attains a speed of 25.1 m/s in 0.55 s . Find the average acceleration of the drag- ster during this time interval...
A bullet going 153 m/s crashes through a wood plank. After passing through the plank, its speed is 130 m/s. Another bullet, of same mass and size traveling at 92 m/s is also fired at the plank. What...
1. A man jumps a fence 2.45 m. If the PEg at the top point of his trajectory was 1.59 * 10^3 J, what was his mass? a) 666 kg b) 662 kg c) 66.2 kg d) 26.6 kg 2. You...
(1) A 3.00 kg ball is dropped from rest from the roof of a building 176.4 m high. While the ball is falling, a horizontal wind exerts a constant force of 12.0 N on the ball. How long until the ball...
How long does it take (in minutes) for light to reach Venus from the Sun, a distance of 1.184 × 108 km? Light travels at 2.998 × 108 m/s through space. Using this value, determine how...
(1) How long does it take a 19 kW steam engine to do 6.8 X 10^7 J of work? a) 1 hr b) 2 hr c) 30 min d) 300 s (2) What is the resultant of a vector that has components...
I am having trouble showing that the baryon to photon ratio is η= nb/nγ ~ 2.7x10-8Ωbh2 where nb and nγ are the number density of baryons and photons respectively, Ωb is the baryon...
Adela throws a softball straight into the air. The ball leaves her hand when it is exactly 5 ft from the ground. The height h of a ball, in feet, can be written as a function of time t, in seconds,...
Roscoe hit a ball straight up at a speed of 110 ft/sec. His bat hit the ball at a height of 3 feet above the ground. After how many seconds did the ball hit the ground?
The height of a golf ball is given by h(t) = -16t2 +48t, where t is the time in seconds and h(t) is the height in feet. A) Why does it make sense that there is no "c"...