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Physics 101 Mechanics Q&A Archive of October 9, 2021

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October 9 of 2021

A soccer player is 15 from her opponent's goal. She kicks the ball hard; after 0.50s, it flies past a defender who stands 5m away. and continues toward the goal. How much time dies the goalie have to move into position to block the kick from the moment the ball leaves the kicker's foot?
Inside a sphere of radius r = 12cm there are 8 × 1023 gas molecules at a temperature of 50oC. What pressure do the molecules exert inside the sphere?
The magnitude of vector Á is 35.0 units and points in the direction 325° counterclockwise from the positive x-axis. Calculate the x- and y-components of this vector.
It is defined as the change in the object's position (from initial position to final position). Displacement has a magnitude as well as the direction, so it is a vector quantity. Suppose a child moves from a position 'x' (initial position) to a position 'y' (final position). Then the distance…
A block of mass m = 5.00 kg slides down a surface inclined 36.9( to the horizontal (Figure 5). The coefficient of kinetic friction is 0.25. A string attached to the block is wrapped around a wheel on a fixed axis at O. The flywheel has mass 25.0 kg and moment of inertia 0.500 kg(m2 with…
A daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 46? ramp leaning on the leftmost bus, reviving at a speed of 34.10 m/s. How long would the stunt last? How many buses can he clear if the top of the takeoff ramp is at the same height, 3.00m…
If P = 20 N, replace the three couples with a single equivalent couple, specifying its magnitude and the direction of its axis.
Using your own analogy (not the slingshot and automobile) make a analogy to show the difference between a Scientifc theory and Scientific Scientific
A body of mass 2.7 kg makes an elastic collision with another body at rest and continues to move in the original direction but with 1/8 of its original speed. (a) What is the mass of the other body? (b) What is the speed of the two-body center of mass if the initial speed of the 2.7 kg body was…
A soccer player is 15 from her opponent's goal. She kicks the ball hard; after 0.50s, it flies past a defender who stands 5m away. and continues toward the goal. How much time dies the goalie have to move into position to block the kick from the moment the ball leaves the kicker's foot?
Inside a sphere of radius r = 12cm there are 8 × 1023 gas molecules at a temperature of 50oC. What pressure do the molecules exert inside the sphere?
The magnitude of vector Á is 35.0 units and points in the direction 325° counterclockwise from the positive x-axis. Calculate the x- and y-components of this vector.
It is defined as the change in the object's position (from initial position to final position). Displacement has a magnitude as well as the direction, so it is a vector quantity. Suppose a child moves from a position 'x' (initial position) to a position 'y' (final position). Then the distance…
A daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 46? ramp leaning on the leftmost bus, reviving at a speed of 34.10 m/s. How long would the stunt last? How many buses can he clear if the top of the takeoff ramp is at the same height, 3.00m…
If P = 20 N, replace the three couples with a single equivalent couple, specifying its magnitude and the direction of its axis.
A body of mass 2.7 kg makes an elastic collision with another body at rest and continues to move in the original direction but with 1/8 of its original speed. (a) What is the mass of the other body? (b) What is the speed of the two-body center of mass if the initial speed of the 2.7 kg body was…