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According to ______ people in a sad mood are more likely to help others because helping others can be rewarding and boost mood.

Select one:

a. Social norm theory

b. Social exchange theory

c. Negative-state relief theory

d. Reciprocal altruism theory

Which of the following best represents an example of a symbolic threat to White Americans

Select one:

a. Universities employing affirmative action when making admission decisions

b. The United States designating both English and Spanish as the country's official national languages

c. Being called out as a racist after having a negative interaction with a member of a different racial group than yourself

d. Companies adopting policies aimed at helping immigrants get jobs

A object is initially moving along a straight line with a velocity of 300 metres

per second and accelerates at 10 metres per second squared for 90 seconds. Calculate

(a) the final velocity 

(b) the total distance the object travels. 

An object of mass 5 kilograms is placed on a plane inclined at 36 degrees to the

horizontal. The object is moving down the plane with a velocity of 2 metres per second. The coefficient of kinetic friction between the box and the plank is 0.3.

Determine

(a) the frictional force. 

(b) acceleration of the box down the plane. 

(c) the distance the object travels down the plane in 8 seconds.

(g=10m/s^2)

A block of wood of mass 14 kilograms is travelling at 12 metres per second on a horizontal surface. It slows down to 8 metres per second over a distance of 50 metres. Determine

(a) the magnitude of the frictional force acting on the block. 

(b) the coefficient of kinetic friction between the block and the surface.

(g=10m/s^2) 

An object of mass 5 kilograms is placed on a plane inclined at 36 degrees to the

horizontal. The object is moving down the plane with a velocity of 2 metres per second. The coefficient of kinetic friction between the box and the plank is 0.3.

Determine

(a) the frictional force. [3]

(b) acceleration of the box down the plane. [4]

(c) the distance the object travels down the plane in 8 seconds.

(g=10m/s^2)

A block of wood of mass 14 kilograms is travelling at 12 metres per second on

a horizontal surface. It slows down to 8 metres per second over a distance of 50 metres. Determine

(a) the magnitude of the frictional force acting on the block. 

(b) the coefficient of kinetic friction between the block and the surface.

(g=10m/s^2)

A object is initially moving along a straight line with a velocity of 300 metres

per second and accelerates at 10 metres per second squared for 90 seconds. Calculate

(a) the final velocity 

(b) the total distance the object travels.