Find the force that F 1,2 the load Q = 10 nC at the point (0,0,0) exerts on the Q2 = 25nC load at the point (4,3,0). F1,2?
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- Boxes A and B in the figure have masses of 10.0 kg and 2.0 kg, respectively. The two boxes are released from rest. Use conservation of energy to find the boxes' speed when box B has fallen a distance of 0.50 m. Assume a frictionless upper surface and a massless pulley. A ВA 2000-kg airplane is coming in for a landing, with a velocity 5 degrees below the horizontal and a drag force of 40 kN acting directly rearward. Kinetic energy will ____ due to the net force of ____. a. increase, 20 kN b. decrease, 40 kN c. increase, 45 kN d. decrease, 45 kNASK YOU A 7.80 g bullet is initially moving at 620 m/s just before it penetrates a block of wood to a depth of 5.80 cm. (a) What is the maanitude of the average frictional force (in N) that is exerted on the bullet while it is moving through the block of wood? Use work and energy considerations to obtain your answer. (b) Assuming the frictional force is constant, how much time (in s) elapses between the moment the bullet enters the block of wood and the moment it stops moving?
- A 5.2-tonne vehicle accelerates to 130 miles per hour in 60 seconds. Calculate the force exerted by the engine ignoring friction losses.6. T F. A girl on a skating board was going to her classroom. She stopped pushing with her foot when she's a bout five meters from the classroom. Letting the friction force slowed her down. The work done by the friction force on the skateboard is Download from Dreamstime.com O negative some other value O positive O zero MacBook Pro G Search or type URL & $ #3 9. 8. 4. 5. 3. K H.Nilo
- a. Calculate the force (in N) needed to bring a 950 kg car to rest from a speed of 80.0 km/h in a distance of 110 m (a fairly typical distance for a non-panic stop). b. Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a). force in (b)/force in (a)=A 8.0-tonne vehicle accelerates to 150 miles per hour in 180 seconds. Calculate the force exerted by the engine ignoring friction losses.A 7.80 g bullet is moving at 460 m/s just before it penetrates a tree trunk to a depth of 4.9 cm (ay What the magnitude of the average frletional force (In N) that is exerted on the bullet whille moving the tree trunk? Uso work considerations to o your answer. (b) Asturing the frictional force is constant, how much time elapses between the moment the bullet enters the tree trunk and the moment it moving?