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In compressing the spring in a toy dart gun, 0.6 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.08 kg.
(a) What is the dart's kinetic energy as it leaves the gun?
(b) What is the dart's speed?
Two positive point charges are a fixed distance apart. The sum of their charges is QT. What charge should each have in order to (a) maximize an electric force between them, and (b) minimize it.
find the tangential and centripetal components of the net force exerted on a car (by the ground) when its speed is 38 m/s, and it has accelerated to this speed from rest in 9.5 s on a curve of radius 370 m. The car's mass is 1000 kg.
A student walks 24 m from her math class and then turns 90° and walks 10 m to her locker, that is directly north of her class. What is her total displacement.
What is the maximum speed of the ball.
A steel rod (? = 7860 kg/m3) has a length of 2.19 m. It is bolted at both ends between immobile supports. Initially there is no tension in the rod, because the rod just fits between the supports. Find the tension that develops when the rod loses 3..
What is the horizontal component of the ball velocity
The velocity graph of a car accelerating from rest to a speed of 60 km/h over a period of 30 seconds is shown. Approximation the distance, d travelled throughout this period.
A 4.00-kg model rocket is launched, expelling 54.9 g of burned fuel from its exhaust at a speed of 690 m/s. What is the velocity of the rocket after fuel has burned.
A block with mass m = 4 kg is sitting on the ground and not moving. The acceleration due to gravity is g = 9.81 m/s2. Please answer the following questions.
Illustrate what is the intensity of the beam transmitted through the three sheets when 1 = 19.0°, 2 = 51.0° and 3 = 100.0° ?
what most height above the ground will the rocket achieve.
A nanowire is a (nearly) one-dimensional structure with a diameter on the order of a few nanometers.
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