Does a magnetic field exert a force on a moving charged object? Assume the motion of the charged object is along the x axis and the field is in the y direction
1.yes
2.no
1
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Free Fall: A hammer is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s2 and there is no atmosphere. What is the speed of the hammer after 8.0 s?
A. 7.0 m/s B. 14 m/s C. 21 m/s D. 64 m/s
The force of gravity between two objects:
A) increases with the masses of the bodies, but decreases with their separations. B) increases with the masses of the bodies, but decreases with the square of the distances between them. C) increases with the square of their masses, but decreases with the cube of their periods of orbit about the Sun. D) depends on the density, not the mass of the bodies. E) depends on the temperature, density, and size of the bodies.
A race car moving with a constant speed of 60 m/s completes one lap around a circular track in 50 s. What is the magnitude of the acceleration of the race car?
a. 8.8 m/s2 b. 7.5 m/s2 c. 9.4 m/s2 d. 6.3 m/s2 e. 5.3 m/s2
Elastic Collisions: A block of mass m = 3.6 kg, moving on a frictionless surface with a speed vi = 9.3 m/s, makes a sudden perfectly elastic collision with a stationary block of mass M, as shown in the figure. Just after the collision, the 3.6-kg block recoils with a speed of vf = 2.7 m/s. What is the speed V of the other block?
A. 6.6 m/s B. 8.0 m/s C. 9.3 m/s D. 10.7 m/s E. 12.0 m/s