Answer:
a) acceleration
Explanation:
Acceleration is, by definition, the change of an object's velocity.
Answer:
m
Explanation:
Consider the motion of the stone in vertical direction:
= initial velocity = 0 m/s
= acceleration due to gravity = 9.8 m/s²
= time taken to hit the water below
= vertical height of the cliff
Using the kinematics equation
eq-1
consider the motion of sound from water in upward direction
= Speed of sound = 343 m/s
= time of travel for sound
Using the equation
eq-2
we have been given that
Using eq-1 and eq-2
m
Answer:
Explanation:
Given
initial speed(u)=5 m/s
Final speed(v)=4 m/s
Distance traveled=3 m
using equation of motion
after this its final velocity will be zero
s=5.33 m
Total distance=3+5.33=8.33 m
Thus he will not be able to win the game
v2 = ?
m1 = 10kg
m2 = 70kg
v1 = 4m/s
E1 = E2
E1 = 1/2 * m1 * v1^2 = 1/2 * 10kg * 4m/s^2 = 80J
E2 = 1/2 * m2 * v2^2 = 80 J
v2 = √(E2/(2 * m2)) = √(80J/(2 * 70kg)) = about 0.76m/s