Answer:
1) A. 0.44 m/s East + 0.33 m/s North
2) A. 0 m/s²
3) A. a scalar calculated as distance divided by time.
4) B. 31 km per hour
Explanation:
1) Velocity is DISPLACEMENT over time.
at 1 m/s, total time of walking is 9000 seconds
displacement is 3000 m north and 5000 - 1000 = 4000 m east
4000 m/ 9000 s = 0.44 m/s E
3000 m/ 9000s = 0.33 m/s N
2) constant speed means no acceleration
3) A. a scalar calculated as distance divided by time.
4) displacement 50 km N and 80 km W
v = √(50² + 80²) / (1 + 2) = 31.446603... km/hr
Can you translate that in English ? I'll try to help you out with that..
Answer:
B) Friction
Explanation:
The main source of error is the omission of the effect from friction between block and incline, which is directly proportional to the mass of the block. The force of gravity is constant. The friction force dissipates part of the gravitational potential energy, generating a final speed less than calculated under the consideration of a conservative system. Air resistance is neglected at low speeds like this case.
Answer : Zamir's displacement and Talia's displacement is equal.
Explanation :
Displacement is explained to be the changing position of an object.
Zamir covers total distance 27 m and Talia covers total distance 19 m but Zamir's initial and final position and Talia's initial and final position is same.
So, we can say that Zamir's displacement and Talia's displacement is equal.
Answer:
Diameter decreases by the diameter of 0.0312 m.
Explanation:
Given that,
Bulk modulus = 14.0 × 10¹⁰ N/m²
Diameter d = 2.20 m
Depth = 2.40 km
Pressure = ρ g h = 1030 × 9.81 × 2.4 × 1000
= 24.25 × 10⁶ N/m²
Volume = 
Bulk modulus is equal to
now
Δ r = -0.0156 m
change in diameter
Δ d = -2 × 0.0156
Δ d = -0.0312 m
Diameter decreases by the diameter of 0.0312 m.
