Answer:
Time taken to reach its maximum height is 2.04 seconds.
Explanation:
It is given that, a tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of 20.0 m/s at time t = 0 s.
At maximum height, its final velocity v = 0
Let t is the time taken by the tennis ball to reach its maximum height. We know that for a freely falling object, the value of acceleration is -g or -9.8 m/s².
Using first equation of motion as :
t = 2.04 seconds
Therefore, this is the required solution.
Brace and bits, meat grinder, submarine hatch, screw lid jar, drills, machine screws, door lock, wooden handled cork screw.
The smaller the displacement, the smallest restoring force it will create.
As seen from the figure given below, The spring system follows the equation,
F = -Kx
where, x is the displacement
F is the restoring force
k is the spring constant
If , K is kept constant, then,
F is directly proportional to the displacement but it acts in opposite direction due to negative sign.
Answer:
E) e
Explanation:
Impulse is equal to the product between the force applied (F) and the time interval of the collision (
):
This means that we can calculate the force for each collision dividing the impulse by the time interval:
Let's apply the formula to each case:
A) 
B) 
C) 
D) 
E) 
Therefore, the force is the maximum for collision E).
Answer:It takes a satellite 12.93 hours to complete an orbit around the earth if it is at 1500miles above the earth at a velocity of 38,00mph
Explanation:
Taking 3960miles to be the radius of the earth, we use simple proportions to solve
(1500+3960)/(660+3960) × (32000/38000)× 13 = T in hours to complete orbit.
T=(5460/4620) × (32/38) ×13
T= 12.93hours
