Answer:
The magnitude of the net force that produces the deceleration = 1744 N
Explanation:
Using the equations of motion, we can find the deceleration of the car and thereby find the magnitude of the met force that produces such deceleration
v = u + at
where v = final velocity = 18.8 m/s
u = initial velocity = 29.5 m/s
t = 9.14 s
a = ?
v = u + at
18.8 = 29.5 + 9.14a
9.14a = 18.8 - 29.5 = -10.7
a = - 1.171 m/s²
Magnitude of Force causing deceleration = ma = 1490 × 1.171 = 1744 N
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Answer:
a) (Positive), b) . The collision is not perfectly elastic.
Explanation:
a) The collision can be described by the Principle of Momentum Conservation and Principle of Energy Conservation:
The final velocity of the rock is:
b) The coefficient of restitution is the best criterion to distinguish elastic collsions from inelastic collisions, such criterion is the ratio of final energy of the system to initial energy of the system:
The collision is not perfectly elastic.
Answer:
6.1328 kg
60.16284 N
Explanation:
r = Radius of ball = 0.11 m
= Density of fluid = (Assumed)
g = Acceleration due to gravity = 9.81 m/s²
m = Mass of ball
V = Volume of ball =
The weight of the bowling ball will balance the buouyant force
The mass of the bowling ball will be 6.1328 kg
Weight will be