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2 years ago

What is the speed of a bobsled whose distance-time graph indicates that it traveled 113m in 29s?

1 answer:

3 0

In this item, we are asked to determine the speed of the bobsled given the distance traveled and the time it takes to cover the certain distance. This can mathematically be expressed as,
speed = distance / time

Substituting the given values in this item,
speed = (113 m) / (29 s)
speed = 3.90 m/s

ANSWER: 3.90 m/s

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butalik [34]

Answer:

D. Find the kinetic energy of the wheel at 6.00 z when the force is removed.

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2 years ago

A hockey player makes a slap shot exerting a constant force of 40.0 newtons on the puck for .2 seconds. What is the magnitude of

Taya2010 [7]

Answer:

Magnitude of impulsive force is 8 N.s.

Explanation:

Given:

Force acting on the puck is, $F=40.0\ N$

Time interval for which the force acts is, $\Delta t=0.2\ s$

We are asked to find the impulsive force.

Impulsive force acting on a body is the sudden change in the momentum of the body due to the application of a large constant force for a very small interval of time.

Here, the hockey player applies a large force of 40 N for a very short interval of time. So, the impact on the puck is measured as Impulse and is represented by 'J'.

Impulse in terms of applied force and time interval is given as:

$J=F\Delta t$

Plug in the given values and solve for 'J'. This gives,

$J=40\times 0.2\\J=8\ N\cdot s$

Therefore, the magnitude of impulsive force is 8 N.s.

6 0

2 years ago

A ramp is used to load furniture onto a moving truck. The person does 1240 J of work pushing

Len [333]

Answer:

The efficiency of the ramp is, Eff = 6.63 %

Explanation:

Given,

The work done by the person pushing the furniture up the ramp is, W₁ = 1240 J

The work done by the ramp is, W₀ = 822 J

The efficiency of the ramp is given by the formula,

Eff = ( W₀ / W₁ ) x 100%

= ( 822 / 12400 ) x 100%

= 6.63 %

Hence, the efficiency of the ramp is, Eff = 6.63 %

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2 years ago

Which of the following is true about Viscosity of liquids:

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2 years ago

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How do land and sea breeze work?

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by the wind and air flow in the wind

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3 years ago