# physics Work unit

posted by .

1. A football player pushes a tackle dummy forwards at a constant 0.85m/s for 11m using 7150J of energy. The tackling dummy mass is 120kg.
a) find force the player exerts?
b) what is the frictional force the dummy exerts?
c) what work is done by the friction as the dummy is slid along the field for 11m?
d) Is mass necessary for this question? if not, what force question could be asked that would require the mass of the dummy?

2. A person pushes a hockey puck with their stick at an angle so the vertical force is 22N [down] and the horizontal force is 45N [forward]. Assume the ice is frictionless.
a) what is the actual force the hockey plaer transmits to the puck?
b) what is the work done by the person pushing the stick if they push the puck for 3.0s as it moves with a constant velocity of 22m/s [forward]

## Similar Questions

1. ### physics

the sensor in the torso of a crash-test dummy records the magnitude and direction of the net force acting on the dummy. if the dummy is thrown forward with a force of 130.0 N while simultaneously being hit from side with a force of …
2. ### Physics

In a simulated head-on crash test, a car impacts a wall at 25 mi/h (40 km/h) and comes abruptly to rest. A 120 lb passenger dummy (with a mass of 55 kg), without a seat belt, is stopped by an air bag, which exerts a force on the dummy …
3. ### Physics

In a simulated head-on crash test, a car impacts a wall at 25 mi/h (40 km/h) and comes abruptly to rest. A 120 lb passenger dummy (with a mass of 55 kg), without a seat belt, is stopped by an air bag, which exerts a force on the dummy …
4. ### physics

A test car with a dummy driver of mass 60 kg was propelled towards a rigid wall. If the speed of the dummy driver just before impact was 40m/s and the time between the collision and the dummy coming to the rest was 0.10 s, calculate: …
5. ### physical science

during a football game two players try to tackle another player.one player applies a force of 50.0 n to the east. a second player applies a force of 120.0 n to the north . what is the total applied force?
6. ### Physics Work unit

1. A football player pushes a tackle dummy forwards at a constant 0.85m/s for 11m using 7150J of energy. The tackling dummy mass is 120kg. a) find force the player exerts?

1. A football player pushes a dummy forwards at a constant 0.85m/s for 11m using 7150 J of energy. The dummy has a mass of 120 kg. Find the force the football player exerts, find the frictional force the dummy exerts. - for my answer …
8. ### physics

A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N frictional force. He pushes in a direction 25.0ยบ below the horizontal. (a) What is the work done on the cart by friction?
9. ### Physics

A football player pushes a tackling dummy forwards at a constant speed for 111m using 7150J of energy. b)What is the frictional force the dummy exerts?
10. ### Physics

A football player kicks a ball of mass 1.534 kg across the field using a constant force of 13.4 N over a distance 30.0 m. How much work does the football player do?

More Similar Questions