Question

# An athlete competing in long jump leaves the ground with a speed of 10.0 m/s at...

An athlete competing in long jump leaves the ground with a speed of 10.0 m/s at an angle of 45º above the horizontal. What is the horizontal distance of the point where he lands from the point where the leaves the ground?

Select one:

a. 4.8 m

b. 3.4 m

c. 10.2 m

d. 5.1 m

A 8.00 kg box is in contact with a 12.00 kg box on a frictionless surface as shown. The 8.00-kg block is being pushed by a 10.0-N force. What is the magnitude of the force that 12.00-kg mass provides on the 8.00-kg mass?

Select one:

a. 6.00 N

b. 4.00 N

c. 12.0 N

d. 10.0 N

A moon of the planet Jupiter (mass of Jupiter = 1.90 X 1027 kg) is at the average distance of 4.22 X 108 m from Jupiter. What is the orbital period of the moon?

Select one:

a. 1.77 days

b. 1.50 days

c. 1.22 days

d. 2.90 days

The x- and y- components of a force vector are 2.00 N and 4.00 N, respectively. Determine the direction of the force vector with the positive x-axis.

Select one:

a. 72.0º

b. 243º

c. 117º

d. 63.4º

A 1200 kg car rounds a corner of radius r = 45.0 m. If the coefficient of static friction between the tires and the road is 0.600, what is the greatest speed the car can have in the corner without skidding?

Select one:

a. 10.0 m/s

b. 25.4 m/s

c. 16.3 m/s

d. 19.0 m/s

A ball is thrown horizontally with a speed of 10.0 m/s from a height of 49.0 m above the ground. How long does the ball remain in the air before striking the ground?

Select one:

a. 0.64 s

b. 4.43 s

c. 3.16 s

d. 2.96 s

As shown in the figure, a 4.0 kg concrete block rests on a smooth level table (assume no friction). A 6.0 kg mass is attached to the block by a string of negligible mass passed over a light frictionless pulley. Determine the acceleration of the system (in meter per second squared unit) when the masses are released.

Select one:

a. 4.4

b. 3.6

c. 9.8

d. 5.9

Correct option is : (d) 5.1 m.

Solution :

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