What does the path of an object look like when it is in uniform motion ?
1 answer:
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Answer:
(a). The horizontal velocity is 1.46 m/s.
(b). The direction of the mug's velocity just before it hit the floor is 74.7° below the horizontal.
Explanation:
Given that,
Height of the counter = 1.46 m
Distance = 0.80 m
We need to calculate the time
Using equation of motion
Put the value into the formula
Here, horizontal velocity is constant
(a). We need to calculate the velocity
Using formula of velocity
Put the value into the formula
(b). We need to calculate the final velocity
Using equation of motion
Put the value into the formula
The velocity is 5.34 m/s downward.
We need to calculate the direction
Using formula of direction
Hence, (a). The horizontal velocity is 1.46 m/s.
(b). The direction of the mug's velocity just before it hit the floor is 74.7° below the horizontal.
Answer:
a) 24 J
b) Gravitational Force
c) 45 J
d) 0
e) 6.782m/s
Explanation:
a) m = 3kg
v = 4m/s
h = 1.5m
KE = ?
0.5 * 3 * 16 = 24J
b) Gravitational force
c) F = ma = 3 * 10 = 30N
Work done = Force * distance = 30 * 1.5 = 45J
d) Final Kinetic Energy of the ball is zero because the ball eventually stops moving
e) velocity of ball as it strikes the ground = v
where
v is the velocity as it strikes the ground
u is the initial velocity
a is acceleration
s is the distance
Now since the ball is thrown downwards, a is positive because the velocity of the ball is increasing as the gravitational force acts on it
u = 4m/s
a = 10
s = 1.5
=>
=
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