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Explain how varies gravitational acceleration with depth.
Physics
The driver of a car travels 10 km, north after that he turned 8 km, east to go to his work. How far he might travel if he take the short cut straight to his work? Express your answer in vector.
Physics
The magnitude of is 3.4. Vector lies in the second quadrant and forms an angle of with the y-axis. The components, Ax and Ay, are closest to:
Ax = +1.6, Ay = -3.0
Ax = -3.0, Ay = +1.6
Ax = -1.6, Ay = -3.0
Ax = -1.6, Ay = +3.0
Ax = +3.0, Ay = -1.6
Ax = +1.6, Ay = -3.0
Ax = -3.0, Ay = +1.6
Ax = -1.6, Ay = -3.0
Ax = -1.6, Ay = +3.0
Ax = +3.0, Ay = -1.6
Physics
Vector A has length 5 units and directed to the north. Vector b has length 8 units and is directed to the south. Calculate the magnitude and direction of a - b
A rocket is launched at an angle of 70° above the horizontal from rest. It moves for 30s along this path with an acceleration of 45m/s2. After this time, the engines fail and the rocket proceeds to move as a free body.
a. What is the rocket’s maximum altitude?
b. What is the rocket’s total flight time?
c. What is the rocket’s impact distance (horizontal range)?
A coil of area 10-3 m2 and consisting of 30 turns of wire is placed with its plane at right angles to a magnetic field of flux density 0.1 T. When the coil is withdrawn from the field a meter in series with coil indicates that a charge of 100 mC has flown around the circuit. What is the combined resistance of the coil and meter?
a wire loop with radius 0.5 m and resistance 2 W is placed in a long solenoid with the plane of the loop perpendicular to the axis of the solenoid. The solenoid has a radius of 0.15 m and has 2500 turns per meter. A current is switched on inside the solenoid and reaches its maximum value in 0.02 s. If a current of 4 mA if induced in the loop, what is the maximum value of the current induced in the solenoid?
Physics
Two vehicles A (mass 520kg) and B (1.7 tons) collide at an intersection. Before the collision, vehicle A traveled at a velocity of 120km/h in an eastern direction and vehicle B traveled with a velocity of 85km/h in a northern direction. The collision is in elastic.
1. Calculate the momentum of Vehicle A before the collision (magnitude only).
2. Calculate the momentum of vehicle B before the collision (magnitude only).
3. Calculate the momentum before the collision (magnitude only).
1. Calculate the momentum of Vehicle A before the collision (magnitude only).
2. Calculate the momentum of vehicle B before the collision (magnitude only).
3. Calculate the momentum before the collision (magnitude only).
Physics
Two vehicles A (mass 520kg) and B (1.7 tons) collide at an intersection. Before the collision, vehicle A traveled at a velocity of 120km/h in an eastern direction and vehicle B traveled with a velocity of 85km/h in a northern direction. The collision is in elastic. Calculate the momentum of Vehicle A before the collision (magnitude only
calculate the angular frequency of hinged rigid body.
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#339914 on Dec 2023
#339914 on Dec 2023