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Giselle Cyr

Giselle C.

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Viewed Questions

A car accelerates uniformly from rest to a speed of 40.0 mi/h in 12.0 s. Find (a) the distance the car travels during this time and (b) the constant acceleration of the car.

A car accelerates uniformly from rest to a speed of 40.0 mi/h in 12.0 s. Find (a) the distance the car travels during this time and (b) the constant acceleration of the car.

College Physics

A car moving initially at a speed of $50 \mathrm{mi} / \mathrm{h}(\approx 80 \mathrm{~km} / \mathrm{h})$ and weighing $3000 \mathrm{lb}(\approx 13,000 \mathrm{~N})$ is brought to a stop in a distance of $200 \mathrm{ft}(\approx 61 \mathrm{~m})$. Find $(a)$ the braking force and $(b)$ the time required to stop. Assuming the same braking force, find $(c)$ the distance and $(d)$ the time required to stop if the car were going $25 \mathrm{mi} / \mathrm{h}(\approx 40 \mathrm{~km} / \mathrm{h})$ initially.

A car moving initially at a speed of $50 \mathrm{mi} / \mathrm{h}(\approx 80 \mathrm{~km} / \mathrm{h})$ and weighing $3000 \mathrm{lb}(\approx 13,000 \mathrm{~N})$ is brought to a stop in a distance of $200 \mathrm{ft}(\approx 61 \mathrm{~m})$. Find $(a)$ the braking force and $(b)$ the time required to stop. Assuming the same braking force, find $(c)$ the distance and $(d)$ the time required to stop if the car were going $25 \mathrm{mi} / \mathrm{h}(\approx 40 \mathrm{~km} / \mathrm{h})$ initially.

Physics

A $60 \mathrm{~kg}$ skier leaves the end of a ski-jump ramp with a velocity of $27 \mathrm{~m} / \mathrm{s}$ directed $25^{\circ}$ above the horizontal. Suppose that as a result of air drag the skier returns to the ground with a speed of 22 $\mathrm{m} / \mathrm{s}$, landing $14 \mathrm{~m}$ vertically below the end of the ramp. From the launch to the return to the ground, by how much is the mechanical energy of the skier-Earth system reduced because of air drag?

A $60 \mathrm{~kg}$ skier leaves the end of a ski-jump ramp with a velocity of $27 \mathrm{~m} / \mathrm{s}$ directed $25^{\circ}$ above the horizontal. Suppose that as a result of air drag the skier returns to the ground with a speed of 22 $\mathrm{m} / \mathrm{s}$, landing $14 \mathrm{~m}$ vertically below the end of the ramp. From the launch to the return to the ground, by how much is the mechanical energy of the skier-Earth system reduced because of air drag?

Principles of Physics

A meterstick of negligible mass has a $0.20-\mathrm{kg}$ mass at its $35 \mathrm{~cm}$ mark and a $0.40-\mathrm{kg}$ mass at the $75-\mathrm{cm}$ mark. Where should the fulcrum be so the meterstick is balanced?

A meterstick of negligible mass has a $0.20-\mathrm{kg}$ mass at its $35 \mathrm{~cm}$ mark and a $0.40-\mathrm{kg}$ mass at the $75-\mathrm{cm}$ mark. Where should the fulcrum be so the meterstick is balanced?

Essential College Physics

Questions asked

ANSWERED

Ivan Kochetkov verified

Numerade educator

A van with a mass of 2100 kg is travelling in a straight line along a horizontal road at a speed of 25 m/s. The brakes are applied and supply a constant force of 6600 N. The van comes to a complete stop in 8.4 seconds. Ignore air drag and assume the braking force is the only horizontal force acting on the van. What is the braking distance, how far does it travel during the braking process? What is the acceleration of the van during the braking process?

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ANSWERED

Anand Jangid verified

Numerade educator

A truck with a mass of 2100 kg is travelling in a straight line along a horizontal road at a speed of 25 m/s. The brakes are applied and supply a constant force of 6600 N. The truck comes to a complete stop in 8.4 seconds. Ignore air drag and assume the braking force is the only horizontal force acting on the car. What is the braking distance, i.e. how far does it travel during the braking process? What is the acceleration of the car during the braking process?

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ANSWERED

Timothy James verified

Numerade educator

If you drop a ball in the absence of air resistance, it accelerates downward at 9.8 m/s2. If instead you throw the ball upward, then its acceleration just after release is 9.8 m/s2 upward. upward but less than 9.8 m/s2 . zero. downward but less than 9.8 m/s2 . 9.8 m/s2 downward.

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ANSWERED

Nicholas Mogoi verified

Numerade educator

1. In a collision between a huge SUV and a small hybrid car, the SUV exerts a larger force on the hybrid than the hybrid exerts on the SUV. True False It depends on whether the collision is a head-on collision or a rear-end collision.

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ANSWERED

James Kiss verified

Numerade educator

A strip of fur is rubbed against a hard rubber rod. The rod thereby acquires a negative charge because frictional forces create electrons. rubbing caused electrons to move from the fur to the rod. friction caused protons to be removed from the rod. electrons from the air molecules are transferred to the rod.

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ANSWERED

Chasen Shaw verified

Numerade educator

thoughtful

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ANSWERED

Dave Kratz verified

Numerade educator

Two people sit face to face on nice skateboards that are free to roll without friction. They push each other with a force of 50 N and move apart. Person X, whose mass (including the skateboard) is 80 kg, moves to the left at 3 m/s. Person Z, whose mass (including the skateboard) is 60 kg, moves to the right at 2.5 m/s. moves to the right at 1 m/s. moves to the right at 4 m/s. moves to the right at 10 m/s.

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INSTANT ANSWER

A system consists of a a merry-go-round with a boy onboard, spinning freely. The boy quickly moves straight from the outer edge of the merry-go-round to the center. As he does this, ________. the rotational inertia of the system decreases and the rotational speed increases. the rotational inertia of the system decreases and the rotational speed decreases. the rotational inertia of the system decreases and the rotational speed remains the same. the rotational inertia of the system increases and the rotational speed increases. the rotational inertia of the system increases and the rotational speed decreases.

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INSTANT ANSWER

A system consists of a a merry-go-round with a kid onboard, spinning freely. The kid quickly moves straight from the outer edge of the merry-go-round to the center. As she does this, ________. the rotational inertia of the system decreases and the rotational speed increases. the rotational inertia of the system decreases and the rotational speed decreases. the rotational inertia of the system decreases and the rotational speed remains the same. the rotational inertia of the system increases and the rotational speed increases. the rotational inertia of the system increases and the rotational speed decreases. distance travelled. instantaneous velocity. average velocity. speed. acceleration.

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ANSWERED

Ankur S verified

Numerade educator

The velocity of a moving object is graphed as a function of time. The slope of the graph at any point may be identified with distance travelled. instantaneous velocity. average velocity. speed. acceleration.

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