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An aircraft heads north at 320km/h relative to the wind . The wind velocity is 80km/h from the north. Find the velocity of the aircraft relative to the aircraft relative to the ground
A car is moving with a velocity of 2 m/s and accelerates at 1.2 m/s^2, covering a distance of 45 m. How long did the car accelerate?
A ball was thrown with a velocity of 55 ft/s upwards. If caught at the same level as it was thrown, how high did the ball rise? And how long was the ball in the air?
A bullet of m=8.00g is fired into a block of mass M=240g that is initially at rest at the edge of a table of height h=1.00m.The bullet remains in the block,and after the impact the block lands d=1.80 m from the bottom of the table.Determine the initial speed of the bullet.
An object with mass 15.5kg and another one with mass 12.0kg are suspended, joined by a cord that passes over a pulley with a radius of 10.0cm and a mass of 3.00kg.The cord has a negligible mass and does not slip on the pulley.The pulley rotates on its axis without friction.The objects start from rest 3.00 m apart.Treating the pulley as a uniform disk, determine the speeds of the two objects as they pass each other.
A 2-kg mass of oxygen expands at a constant pressure of 172 kPa in a piston-cylinder system from a temperature of 32 C to a final temperature of 18 C. Determine (a) the heat required; (b) the work; (c) the change of enthalpy; (d) the change of internal energy.
A person is lying on a diving board 3.00 m above the surface of the water in a swimming pool. She looks at a penny that is on the bottom of the pool directly below her. To her, the penny appears to be a distance of 7.00 m from her. What is the depth of the water at this point?
A person is lying on a diving board 3.00 m above the surface of the water in a swimming pool. She looks at a penny that is on the bottom of the pool directly below her. To her, the penny appears to be a distance of 7.00 m from her. What is the depth of the water at this point?
A lens forms an image of an object. The object is 16.0 cm from the lens. The image is 12.0 cm from the lens on the same side as the object. (a) What is the focal length of the lens? Is the lens converging or diverging? (b) If the object is 8.50 mm tall, how tall is the image? Is it erect or inverted? (c) Draw a principal-ray diagram.
A person is lying on a diving board 3.00 m above the surface of the water in a swimming pool. She looks at a penny that is on the bottom of the pool directly below her. To her, the penny appears to be a distance of 7.00 m from her. What is the depth of the water at this point?
