7. A persoe punhes a \( 140-\mathrm{kg} \mathrm{~ l a w n ~ m o w e r ~ a t ~ c o} \) force of \( \mathrm{F}_{\mathrm{A}}=\mathrm{sk} .0 \mathrm{~N} \mathrm{~ d i r e w e d ~ a l o f g ~ t h e ~ h} \) of \( 45.0^{r} \) bo the horixontal (i) Draw the free-boly diagum showing alt foeces wcting en the] maucr. Calculate \( (b) \) the horinental frictica force on the mower, then (c) the normal fores exerted vertically upuand on the mower by the proend. (d) What foece must the person exert on the lawn mower to accelcrate it feom fest to \( 1.5 \mathrm{~m} / \mathrm{s} \) in \( 2.5 \) scoonds, assuming the same friction force?
Added by Venezia G.
Close
Step 1
Identify the problem or task at hand. Show more…
Show all steps
Your feedback will help us improve your experience
Madhur L and 69 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
(II) A person pushes a 14.0-kg lawn mower at constant speed with a force of $F=$ 88.0 N directed along the handle, which is at an angle of 45.0$^\circ$ to the horizontal (Fig. 4-58). ($a$) Draw the free-body diagram showing all forces acting on the mower. Calculate ($b$) the horizontal friction force on the mower, then ($c$) the normal force exerted vertically upward on the mower by the ground. ($d$) What force must the person exert on the lawn mower to accelerate it from rest to 1.5 m/s in 2.5 seconds, assuming the same friction force? (Figure can't copy) (Fig. 4-58)
DYNAMICS: NEWTON'S LAWS OF MOTION
Problems Involving Friction, Inclines
(II) A person pushes a 14.0 -kg lawn mower at constant speed with a force of $F=88.0 \mathrm{N}$ directed along the handle, which is at an angle of $45.0^{\circ}$ to the horizontal (Fig. $4-45 )$ . (a) Draw the free-body diagram showing all forces acting on the mower. Calculate (b) the horizontal friction force on the mower, then $(c)$ the normal force exerted vertically upward on the mower by the ground. (d) What force must the person exert on the lawn mower to accelerate it from rest to 1.5 $\mathrm{m} / \mathrm{s}$ in 2.5 seconds, assuming the same friction force?
A girl pushes a 25-kg lawn mower as shown in veig. 4.39. If $F=30 \mathrm{~N}$ and $\theta=37^{\circ}$ (a) what is the acceleration of the mower, and (b) what is the normal force exerted on the mower by the lawn? Ignore friction.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Watch the video solution with this free unlock.
EMAIL
PASSWORD