A $81kg$ football player is running with a $50N$ force in his feet right. The coefficient of friction between his feet and ground is $0\mathrm{.}67.$

a$)$ Draw a FBD$.($Hint: $4$ arrows$)$

b$)$ What is his weight?

c$)$ What is the friction force?

d$)$ What is the net force?

e$)$ What is the acceleration?

A dog is pushing a ball with its nose with an unknown force. The mass of the ball is $0\mathrm{.}5kg,$ and is accelerating at $0\mathrm{.}22\frac{m}{s^2}.$ The coefficient of friction between the ball and floor is $0\mathrm{.}17.$

a$)$ Draw a FBD $($Hint: $4$ arrows$)$

b$)$ What is the weight of the ball?

c$)$ What is the friction force?

d$)$ What is the unknown force provided by the dog?

Dynamics Worksheet $5$

A soccer ball is being pushed by the wind left at $41N.$ The mass of the soccer ball is $0\mathrm{.}39kg.$ The coefficient of friction between the ball and grass is $0\mathrm{.}646.$

a$)$ Draw a FBD $($Hint: $4$ arrows$)$

b$)$ What is the weight of the ball?

c$)$ What is the frictional force?

d$)$ What is the net force?

e$)$ What is the acceleration?

A tow truck is pulling a truck left with $823N$ of force. The friction force between the truck and ground is $765N.$ The coefficient of friction between the truck and ground is $0\mathrm{.}84.$

a$)$ Draw a FBD $($Hint: $4$ arrows$)$

b$)$ What is the net force?

c$)$ What is the weight of the truck?

d$)$ What is the mass of the truck?

e$)$ What is the acceleration of the truck?

An object with a mass of $100kg$ is on a surface with a coefficient of friction of $0\mathrm{.}405.$ It is accelerating right with help to a crane at $6\frac{m}{s^2}.$

a$)$ Draw a FBD$.$

b$)$ What is the net force?

c$)$ What is the friction force?

d$)$ What is the force provided by the crane?

A fish is being pulled right with $34\mathrm{.}6N$ across a table. A friction force of $10\mathrm{.}8N$ is applied to the fish. The weight of the wish is $50N.$

a$)$ Draw a FBD$.$

b$)$ What is the net force?

c$)$ What is the mass?

d$)$ What is the acceleration?

A toy with $8N$ of weight is pushed to the right with $5N$ of force. The coefficient of friction is $0\mathrm{.}91.$

a$)$ Draw a FBD$.$

b$)$ What is the friction force?

c$)$ What is the net force?

d$)$ What is the acceleration?